HomeMy WebLinkAbout; Carlsbad Golf Course Paleontological Mit Report; Carlsbad Golf Course Paleontological Mit Report; 2006-08-01PALEONTOLOGICAL MITIGATION REPORT
CARLSBAD MUNICIPAL GOLF COURSE
CITY OF CARLSBAD,
SAN DIEGO COUNTY, CALIFORNIA
Preparedfor:
City of Carlsbad
Parks and Recreation Department
1200 Carlsbad Village Drive
Carlsbad, CA 92008
Under contract to:
Dudek & Associates
605 Third Street
Encinitas, CA 92024
Prepared by:
Department of PaleoServices
San Diego Natural History Museum
P.O. Box 121390
San Diego, California 92112
Thomas A. Demere, Ph.D., Director
August 2006
TABLE OF CONTENTS
Section Page
PROJECT SUMMARY iv
1.0 INTRODUCTION 1
1.1 Project Description 1
1.2 Definition and Significance of Paleontological Resources 1
1.3 PERSONNEL 3
2.0 METHODS 5
2.1 Field Methods 5
2.1.1 Monitoring 5
2.1.2 Fossil Salvage 5
2.1.3 Stratigraphic Data Collection 6
2.2 Laboratory Methods 6
2.2.1 Macrofossil Specimen Preparation 6
2.2.2 Fossil Curation 7
3.0 RESULTS 8
3.1 Stratigraphy 8
3.1.1 Santiago Peak Volcanics 8
3.1.2 Santiago Formation 8
3.1.3 Lindavista Formation (=unnamed Pleistocene marine terrace deposits) 9
3.2 Paleontological Collection Localities 9
3.2.1 SDSNH Locality 5758 9
3.2.2 SDSNH Locality 5759 9
3.2.3 SDSNH Locality 5762 11
3.2.4 SDSNH Locality 5763 11
3.2.5 SDSNH Locality 5764 11
3.2.6 SDSNH Locality 5765 11
3.2.7 SDSNH Locality 5766 11
3.2.8 SDSNH Locality 5767 11
3.2.9 SDSNH Locality 5768 12
3.2.10 SDSNH Locality 5769 12
3.2.11 SDSNH Locality 5770 12
3.2.12 SDSNH Locality 5771 12
3.2.13 SDSNH Locality 5772 12
3.2.14 SDSNH Locality 5773 13
3.2.15 SDSNH Locality 5780 13
3.2.16 SDSNH Locality 5791 13
3.3 Paleontology 13
3.3.1 Cnidaria (corals and jellyfish) 13
3.3.2 Mollusca (clams and snails) 13
3.3.3 Echinodermata (sea urchins, sand dollars, and sea stars) 15
3.3.4 Chordata (fish, amphibians, reptiles, birds, and mammals) 15
Paleontological Mitigation Report - Carlsbad Municipal Golf Course "
4.0 DISCUSSION 18
4.1 Introduction 18
4.2 Geologic Setting 18
4.3 Stratigraphy and Paleontology 19
4.3.1 Santiago Formation 19
4.3.2 Lindavista Formation 20
5.0 CONCLUSIONS 22
6.0 REFERENCES 23
LIST OF FIGURES
Figure 1. Index map of western San Diego County 2
Figure 2. Map showing approximate project area boundaries and fossil localities 4
Figure 3. Composite stratigraphic column 10
Figure 4. Temporary exposure of "Member B" 14
Figure 5. Representative fossil invertebrates 16
Figure 6. Partial fossil bird right humerus 17
APPENDICES 26
Paleontological Mitigation Report - Carlsbad Municipal Golf Course
PROJECT SUMMARY
This report presents the results of the paleontological resource mitigation program conducted during
mass grading of the Carlsbad Municipal Golf Course, City of Carlsbad, San Diego County,
California (Figure 1). This mitigation program included construction monitoring, fossil salvage,
laboratory preparation of salvaged specimens, curation of prepared specimens, and storage of curated
specimens. Work was performed for the City of Carlsbad through a contract administered by Dudek
Environmental, Inc.
The Carlsbad Municipal Golf Course project involved mass grading for construction of fairways and
support structures for the new municipal golf course. Paleontological monitoring of excavation
activities took place wherever potentially fossiliferous native sedimentary rocks were impacted, and
involved inspection of fresh cut slopes and graded pad surfaces for unearthed fossil remains.
Monitoring of construction excavations took place from September 2005 through April 2006.
The paleontological resource mitigation program conducted for the Carlsbad Municipal Golf Course
project reduced adverse impacts on paleontological resources by on-site grading to below the level of
significance through construction monitoring and fossil salvage. This work resulted in the recovery
of significant paleontological resources from 15 general fossil collecting localities discovered during
excavations into deposits of the middle Eocene-aged (40-48 million years old) Santiago Formation
and Pleistocene-aged (400,000-700,000 years old) Lindavista Formation. These resources consist of
scientifically significant specimens of fossil vertebrates and invertebrates from the Santiago
Formation and a small collection of trace fossils from the Lindavista Formation.
The recovery of these assemblages of Eocene-age and Pleistocene-age fossils represents a significant
contribution to the study of ancient life in southern California. The preservation of these fossils and
their storage in perpetuity at the San Diego Natural History Museum will ensure their availability to
future generations of citizens, students, and professional scientists.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course
1.0 INTRODUCTION
1.1 Project Description
This report presents the results of the paleontological resource mitigation program conducted during
mass grading of the Carlsbad Municipal Golf Course project site. This mitigation program included
construction monitoring, fossil salvage, laboratory preparation of salvaged specimens, curation of
prepared specimens, and storage of curated specimens. The mitigation program was a requirement of
building permit issued by the City of Carlsbad, San Diego County, California.
The project site is located approximately 2 miles east of Interstate 5 and is bisected by College
Boulevard. Palomar Airport Road borders the project on the south, while Faraday Avenue forms the
northern border (Figures 1 and 2).
1.2 Definition and Significance of Paleontological Resources
Paleontology is a multidisciplinary science that combines elements of geology, biology, chemistry
and physics in an effort to understand the history of life on earth. Paleontological resources, or
fossils, are the remains, imprints or traces of once-living organisms preserved in sedimentary rocks.
Fossils include mineralized, partially mineralized, or unmineralized bones and teeth, soft tissues,
shells, wood, leaf impressions, footprints, burrows, and microscopic remains. The fossil record is the
only direct evidence that life on earth has existed for more than 3.6 billion years. Fossils are
considered non-renewable resources because the organisms they represent no longer exist. Thus,
once destroyed, a fossil can never be replaced. Fossils are important scientific and educational
resources because they are used to:
• Study the evolutionary relationships between extinct organisms, as well as their relationships to
modern groups.
• Elucidate the taphonomic, behavioral, temporal and diagenetic pathways responsible for fossil
preservation, including the biases inherent in the fossil record.
• Reconstruct ancient environments, climate change, and paleoecological relationships.
• Provide a measure of relative geologic dating which forms the basis for biochronology and
biostratigraphy, and which is an independent and corroborating line of evidence for isotopic
dating.
• Study the geographic distribution of organisms and tectonic movements of land masses and
ocean basins through time.
• Study patterns and processes of evolution, extinction and speciation.
• Identify past and potential future human-caused effects to global environments and climates.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course
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Figure 1. Index map of western San Diego County showing the general location of the Carlsbad
Municipal Golf Course project site.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course
1.3 PERSONNEL
Paleontological field monitoring and paleontological salvage work was conducted by Ian D. Browne,
John L. Pfanner, Cory M. Redman, and Bradford O. Riney of the Department of PaleoServices, San
Diego Natural History Museum. Kesler A. Randall, N. Scott Rugh, and Stephen L. Walsh carried
out fossil preparation and curation activities at the Museum. The final report was prepared by Ian D.
Browne and Thomas A. Demere.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course
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Figure 2. Map of the Carlsbad Municipal Golf Course project site showing locations of
paleontological localities and approximate project area boundaries (SDSNH Loc. 4659;
4925; 4926; 4927; 4928; and 4934). Base map: USGS San Luis Rey 7.5' Topographic
Quadrangle. UTM grid shown for reference (Zone 11 S; NAD 27 Datum).
Paleontological Mitigation Report - Carlsbad Municipal Golf Course
2.0 METHODS
2.1 Field Methods
Field activities included monitoring of excavation operations, examination of temporary cut slopes
and graded pad surfaces, and recovery of stratigraphic data. Specific field methods are discussed
more fully below, and were carried out in compliance with the City of Carlsbad's permitting
requirements. Specific field methods and techniques are discussed below.
2.1.1 Monitoring
Mass grading operations were monitored from September 2005 through April 2006. The
paleontological monitoring schedule was determined by conditions in the field. This monitoring
consisted of on-site inspection of areas of active grading and examination of temporary slopes,
finished sidewalls, and graded pad surfaces for contained fossil remains. Ideally, inspection involves
the examination of every newly exposed surface, but operationally this is often impossible. The pace
and quantity of equipment in the cut determines how often and where monitors can inspect. When
active excavations are too dangerous to enter because of a narrow cut, short haul, and/or heavy
traffic, monitoring may be conducted from an elevated vantage point.
Safety procedures followed by field personnel included wearing appropriate clothing (high-visibility
vests and hard hats), carrying large handheld orange flags, securing equipment operators attention
before entering an active cut, notifying grading personnel before beginning a salvage excavation,
marking fossil discovery sites with surveyor's flagging, and using caution while driving on haul
roads. Attendance at safety meetings allowed the paleontological monitors to discuss mutual safety
issues with excavation personnel.
It is important to emphasize that the paleontological monitoring did not interfere with, or delay,
construction operations.
2.1.2 Fossil Salvage
Fossil salvage methods for the Carlsbad Municipal Golf Course project site included "pluck-and-run"
and bulk matrix sampling coupled with screen-washing. The particular type of salvage procedure
employed depended on a number of factors including: importance, size, and number of specimens at
a given discovery site; how critical the area of discovery was to the progress of the construction
schedule; the type of equipment being used in the vicinity of the discovery site; and the opinion of
the construction foreman and/or Resident Engineer.
The duration of individual salvage operations varied from minutes to hours. Most salvages were of
short duration (minutes), and employed "pluck-and-run" recovery techniques. Some salvages
involved the removal of bulk matrix samples that were processed off-site. These techniques are
discussed in greater detail below.
"Pluck-and-Run" This technique is used when equipment activity in the cut is heavy, and
immediate action is required to remove an isolated specimen from the cut so as not to slow the
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 5
progress of grading operations. "Pluck-and-run" salvage involves exploratory probing around a
partially exposed fossil specimen to determine its dimensions, the application of chemical hardeners
(usually Glyptal or Butvar) to stabilize any damaged or weakened areas of the fossil, and removal of
the specimen in a block of matrix. The fossil is then labeled with appropriate field numbers, wrapped
in tissue or newsprint, and transported to the museum for laboratory preparation.
Hand Quarrying Quarry-style salvages for paleontological projects are not of the conventional type
employed for archaeological investigations. Instead, they consist of site-specific "mining" of fossil-
rich sedimentary rock layers typically without the establishment of a geographic grid system (Figure
3). Such quarry sites are worked by hand picking through blocks of ripped-up sedimentary matrix to
discover partially exposed fossils. Fragile fossils are stabilized using a chemical preservative or
adhesive (Butvar, Vinac and/or cyanoacrylate glue) prior to removal from the cut.
Bulk Matrix Sampling & Screen-washing This salvage technique is used for certain sites that
appear in the field to have the potential to produce abundant microvertebrate remains.
Microvertebrate sites are sampled by collecting bulk quantities of sedimentary matrix using picks and
shovels to loosen material and buckets and pick-up trucks to transport material. Offsite matrix
processing involves breaking large blocks of matrix into golf ball-sized pieces to facilitate air-drying;
soaking the dried chunks of matrix in water-filled five gallon buckets to break them down; pouring
the resulting slurry through 30 mesh (0.6 mm) stainless steel screens to separate the coarser sand and
fossil material from the fine clays and silts; drying the coarse concentrate, and transferring the
remaining material into plastic sample bags labeled with all pertinent locality data.
2.1.3 Stratigraphic Data Collection
Stratigraphic data were recorded by examining of fresh bedrock exposures. The goal of this effort
was to delimit the nature of potentially fossiliferous sedimentary rock units within the project
excavations, their geographic distribution, and their lithologic characteristics. Data collected include
lithologic descriptions (color, sorting, texture, structures, and grain size), Stratigraphic relationships
(bedding type, thickness, and contacts), and topographic position. Existing surveyor's stakes were
recorded whenever possible to provide accurate elevation control.
2.2 Laboratory Methods
Laboratory activities included mechanical preparation of fossil specimens, repair of broken/damaged
specimens, and curation of prepared specimens. This work occurred from January to June 2006.
2.2.1 Macrofossil Specimen Preparation
Small and medium-sized fossil specimens (>2 cm) were prepared using standard mechanical fossil
preparation techniques. This work involved the use of hammers and chisels to initially separate
individual fossil shell molds from the sandstone and siltstone matrix blocks. More precise hand tools
(e.g., X-acto knives, dental picks, and pin vises) were then used to expose the finer morphologic
details of the specimens. The fossils were then sorted by species type.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course
2.2.2 Fossil Curation
Fossil curation involved the identification of individual fossil specimens, assignment of unique
specimen catalog numbers, preparation of locality reports, entry of specimen catalog and locality
information into the specimen computer database, printing the specimen label, writing the catalog
number on the specimen using India ink on a patch of white acrylic paint, placement of the specimen
with its label into appropriate-sized paper specimen trays, and storage of the labeled specimen in the
steel "Lane-style" geology storage cabinets in the research collections area of the Museum.
A specimen number can represent a single isolated bone, multiple bones belonging to a single
individual, or a batch of fossil invertebrates belonging to a single species. This curation procedure
was followed for all medium-sized specimens (1-20 cm in size), but was modified for smaller and
larger specimens.
Microfossils, such as small bones or shells, were curated by placing single or multiple specimens in
small glass vials. These vials were sealed with corks painted on their top surface with white acrylic
paint. Locality and specimen catalogue numbers were written on the painted surfaces. Individual
vials were then placed with their corresponding specimen labels in either a cardboard specimen tray
or a specially designed foam base that allowed storage of multiple vials in an upright position.
Cataloguing, numbering, and labeling followed the procedures described above.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course
3.0 RESULTS
3.1 Stratigraphy
Grading operations at the Carlsbad Municipal Golf Course project site exposed three geological rock
units including, from oldest to youngest, metavolcanic rocks of the Jurassic to Cretaceous-age
Santiago Peak Volcanics, Eocene-age sedimentary rocks of the Santiago Formation, and Pleistocene-
age sedimentary rocks tentatively assigned to the Lindavista Formation (Figure 3). The contact
between the Santiago Peak Volcanics and the Santiago Formation is an irregular nonconformity and
occurs in the northeastern portion of the project site in the area of the former police firing range. The
contact between the Santiago Formation and the Lindavista Formation is a planar erosion surface at
approximately elevation 316 feet and occurs along the south side of College Boulevard adjacent to
the fifth fairway.
3.1.1 Santiago Peak Volcanics
Within the Carlsbad Municipal Golf Course project site, rocks of the Jurassic to early Cretaceous-age
Santiago Peak Volcanics consist of fractured and well indurated metavolcanics, primarily andesites.
In places the surface of the metavolcanic rocks are weathered into a clay-rich paleosol (ancient soil).
3.1.2 Santiago Formation
Within the Carlsbad Municipal Golf Course project site, rocks of the Eocene-age Santiago Formation
consist of at least 300 feet of interbedded mudstones, sandy siltstones, medium to coarse-grained
arkosic sandstones, and pebble to cobble conglomerates. The Eocene stratigraphic sequence dips to
the west, is generally well-stratified, and is locally deformed by northwest trending normal faults.
The general Eocene stratigraphy exposed at Carlsbad City Golf Course is divisible into members B
and C of the Santiago Formation. These two units are separated by a marked disconformity.
"Member B" consists of about 35' of section including a 10' thick lower unit of light gray, fine-
grained sandstone containing locality 5791 and a 20' thick upper unit with a basal 5 to 7' thick, light
gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing
localities 5762, 5763, and 5764. "Member C" consists of at least 250 feet of section divisible into 5
subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and consists of very
coarse-grained, poorly sorted sandstones and gravelly conglomerates. Clasts measure up to 7' across
and are derived from pegmatite and granitic outcrops to the east. Unit 1 rapidly grades into a fine-
grained sandstone that is overlain by Unit 2, which begins with a coarse-grained cobble
conglomerate, but rapidly grades into a 20' thick, yellowish, medium- to fine-grained sandstone
containing the "Isognomon Bed" where localities 5766, 5768, 5769, 5770, and 5769 occur within the
uppermost 5'. Unit 2 grades into Unit 3, which is a greenish yellowish gray, silty, massive, very fine-
grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark
greenish gray mudstone ("Green Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards
for another 30'. Localities 5758, 5772, and 5773 occur below the GMMB in Unit 3, while locality
5767 occurs within Unit 3 above the GMMB. A sharp erosional contact separates Unit 3 from Unit
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 8
4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality
5771. Unit 4 is generally normally graded and consists of 40' of section. Unit 5 is the
stratigraphically highest Eocene unit and is characterized by rip-up clast lined channels that grade
into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5
is approximately 20' thick and consists of a series of rip-up clast lined channels ranging from 5'wide
and 1' foot thick to 10' wide and 2' thick within a nearly white, medium grained, cross-bedded
arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an
occasional siltstone rip-up clast lined channel. A reddish brown siltstone 10' thick occurs at the top
of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
3.1.3 Lindavista Formation (=unnamed Pleistocene marine terrace deposits)
Within the Carlsbad Municipal Golf Course project site, rocks of the Santiago Formation are
unconformably overlain locally by less than 10 feet of Pleistocene-age sandstone mapped as an
unnamed Pleistocene marine terrace deposit, but which has been correlated with the Lindavista
Formation (Tan and Kennedy, 1996). Observed lithologies include resistant, flat-lying red-brown,
coarse-grained sandstone and pebble conglomerate.
3.2 Paleontological Collection Localities
Fourteen general fossil localities were discovered within the Santiago Formation on the Carlsbad
Municipal Golf Course project site and a single fossil locality (SDSNH Locality 5780) was
discovered within the Lindavista Formation. The geographic locations and stratigraphic positions of
these localities are shown in figures 2 and 3, respectively. Formal descriptions of these general
localities are included in the Appendix, along with inventories of fossil specimens recovered from
each locality.
3.2.1 SDSNH Locality 5758
This locality was discovered at an approximate elevation of 165 feet within the lower portion of Unit
3 (below the GMMB) of the Santiago Formation ("Member C") as exposed in the vicinity of the
second fairway in the southeastern portion of the Carlsbad Municipal Golf Course project site (see
Figure 2). Internal and external molds of fossil marine invertebrates (clams, snails, and heart
urchins) were recovered from a lense of light olive gray, very fine-grained sandy siltstone.
3.2.2 SDSNH Locality 5759
This locality was discovered at an approximate elevation of 122 feet within the upper portion of Unit
2 of the Santiago Formation ("Member C") as exposed in the vicinity of the seventh grren in the
southeastern portion of the Carlsbad Municipal Golf Course project site (see Figure 2). Internal and
external molds of fossil marine invertebrates (clams and snails) were recovered from a stratum of
pale yellow green, fine-grained silty sandstone. This horizon is informally referred to as the Oyster-
Isognomon bed.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course
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Figure 3. Composite stratigraphic column for the Carlsbad Municipal Golf Course project site, City
of Carlsbad, California. Diagram depicts the lithologies, stratigraphic contacts, and
positions of fossil localities discovered within exposures of the Santiago and Lindavista
formations.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 10
3.2.3 SDSNH Locality 5762
This locality was discovered at an approximate elevation of 122 feet within the upper portion of
"Member B" of the Santiago Formation as exposed in the vicinity of the fifth green in the
southeastern portion of the Carlsbad Municipal Golf Course project site (see Figure 2). Internal and
external molds of fossil estuarine invertebrates (oysters, clams, and snails) were recovered from a
stratum of light green, medium- to coarse-grained sandstone. This horizon is informally referred to
as the Anomia-Isognomon bed.
3.2.4 SDSNH Locality 5763
This locality was discovered at an approximate elevation of 285 feet within the upper portion of
"Member B" of the Santiago Formation as exposed in the vicinity of the fifth green in the
southeastern portion of the Carlsbad Municipal Golf Course project site (see Figure 2). Internal and
external molds of fossil estuarine invertebrates (corals, clams, and snails) were recovered from a
stratum of light green, medium- to coarse-grained sandstone. This horizon is informally referred to
as the Anomia-Isognomon bed.
3.2.5 SDSNH Locality 5764
This locality was discovered at an approximate elevation of 287 feet within the upper portion of
"Member B" of the Santiago Formation as exposed in the vicinity of the fifth green in the
southeastern portion of the Carlsbad Municipal Golf Course project site (see Figure 2). Internal and
external molds of fossil estuarine invertebrates (oysters, clams, and snails) were recovered from a
stratum of light green, medium-grained sandstone. This horizon is informally referred to as the
Anomia-Isognomon bed.
3.2.6 SDSNH Locality 5765
This locality was discovered at an approximate elevation of 104 feet within the Unit 1 of "Member
C" of the Santiago Formation as exposed in the vicinity of the vicinity of the sixteenth green in the
northeastern portion of the Carlsbad Municipal Golf Course project site (see Figure 2). Internal and
external molds of a fossil marine clam were recovered from a stratum of light gray, coarse-grained
sandstone. This horizon occurs stratigraphically below the Oyster-Isognomon bed in Unit 2 of
"Member C".
3.2.7 SDSNH Locality 5766
This locality was discovered at an approximate elevation of 120 feet within the lower portion Unit 2
of "Member C" of the Santiago Formation as exposed in the vicinity of the sixteenth green in the
northeastern portion of the Carlsbad Municipal Golf Course project site (see Figure 2). Internal and
external molds of fossil estuarine invertebrates (oysters, clams, and snails) were recovered from a
stratum of light gray, well cemented, medium-grained sandstone. This horizon is informally referred
to as the Oyster-Isognomon bed.
3.2.8 SDSNH Locality 5767
This locality was discovered at an approximate elevation of 155 feet within the upper portion of Unit
3 (above the GMMB) of the Santiago Formation ("Member C") as exposed in the vicinity of the
sixteenth green in the northeastern portion of the Carlsbad Municipal Golf Course project site (see
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 11
Figure 2). Internal and external molds of fossil marine invertebrates (clams, snails, and scaphopods)
were recovered from a stratum of orange mottled, light green, fine-grained, silty sandstone.
3.2.9 SDSNH Locality 5768
This locality was discovered at an approximate elevation of 148 feet within the lower portion Unit 2
of "Member C" of the Santiago Formation as exposed in the vicinity of the second green in the
southeastern portion of the Carlsbad Municipal Golf Course project site (see Figure 2). Internal and
external molds of fossil estuarine invertebrates (oysters, clams, and snails), as well as a tooth plate of
a bat ray (Myliobatoides) were recovered from a stratum of light gray, fine-grained, locally cemented
sandstone. This horizon is informally referred to as the Oyster-Isognomon bed.
3.2.10 SDSNH Locality 5769
This locality was discovered at an approximate elevation of 112 feet within the lower portion Unit 2
of "Member C" of the Santiago Formation as exposed in the vicinity of the seventh fairway in the
southeastern portion of the Carlsbad Municipal Golf Course project site (see Figure 2). Internal and
external molds and whole shells of fossil estuarine invertebrates (oysters, clams, and snails) were
recovered from a stratum of light gray, well cemented, fine-grained sandstone. This horizon is
informally referred to as the Qyster-Isognomon bed.
3.2.11 SDSNH Locality 5770
This locality was discovered at an approximate elevation of 138 feet within the lower portion Unit 2
of "Member C" of the Santiago Formation as exposed in the vicinity of the seventh fairway in the
southeastern portion of the Carlsbad Municipal Golf Course project site (see Figure 2). Internal and
external molds and whole shells of fossil estuarine invertebrates (oysters, clams, and snails), as well
as shark teeth and bird and mammal bones were recovered from a stratum of light gray to orange
(oxidized), fine-grained, locally cemented sandstone. This horizon is informally referred to as the
Oyster-Isognomon bed.
3.2.12 SDSNH Locality 5771
This locality was discovered at an approximate elevation of 135 feet within the lower portion Unit 4
of "Member C" of the Santiago Formation as exposed in the vicinity of the lake at the eighteenth
fairway in the southwestern portion of the Carlsbad Municipal Golf Course project site (see Figure
2). Internal and external molds of fossil marine clams were recovered from a stratum of interbedded
light pale green, massive mudstone and fine-grained sandstone. This is the stratigraphically highest
fossil horizon discovered in the Santiago Formation.
3.2.13 SDSNH Locality 5772
This locality was discovered at an approximate elevation of 90 feet within the lower portion of Unit 3
(below the GMMB) of the Santiago Formation ("Member C") as exposed in the vicinity of the
fifteenth fairway in the northeastern portion of the Carlsbad Municipal Golf Course project site (see
Figure 2). An external mold of a fossil marine snail (Turritella uvasand) was recovered from a light
green to orange (oxidized), fine-grained silty sandstone.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 12
3.2.14 SDSNH Locality 5773
This locality was discovered at an approximate elevation of 134 feet within the lower portion of Unit
3 (below the GMMB) of the Santiago Formation ("Member C") as exposed in the vicinity of the
second fairway in the southeastern portion of the Carlsbad Municipal Golf Course project site (see
Figure 2). Internal and external molds of fossil marine clams (Marcia bunkeri, Pitar sp., and Area
sp.) were recovered from a pale green to orange (oxidized), fine-grained silty sandstone.
3.2.15 SDSNH Locality 5780
This locality was discovered at an approximate elevation of 316 feet at the base of the Lindavista
Formation as exposed in the vicinity of the Industrial pad in the eastern portion of the Carlsbad
Municipal Golf Course project site (see Figure 2). A single burrow of a rock-boring clam
(Pholadidae) was recovered from a stratum of yellowish orange, very micaceous, medium-grained
sandstone.
3.2.16 SDSNH Locality 5791
This locality was discovered at an approximate elevation of 279 feet within the lower portion of
"Member B" of the Santiago Formation as exposed in the vicinity of the fifth green in the
southeastern portion of the Carlsbad Municipal Golf Course project site (see Figures 2 and 4).
Internal and external molds of fossil estuarine invertebrates (oysters, clams, and snails) were
recovered from a stratum of brownish gray, well cemented, coarse-grained sandstone. This is the
stratigraphically lowest fossil horizon discovered in the Santiago Formation.
3.3 Paleontology
Fossil remains collected during the monitoring and salvage phases of this mitigation program were
recovered from Eocene-age terrestrial and nearshore marine, and Pleistocene-age nearshore marine
sedimentary deposits. The following section of this report combines taxonomic records from all
collecting localities and discusses them within the context of higher taxa (e.g., molluscs,
echinoderms, and vertebrates). Fossil were identified by Thomas A. Demere, Kesler A. Randall, and
N. Scott Rugh of the San Diego Natural History Museum.
3.3.1 Cnidaria (corals and jellyfish)
A single impression of the calice of a stony coral (Scleractinia) was recovered from SDNHM
Locality 5763. Although not well preserved, this specimen represents one of the only records of
corals from the Santiago Formation.
3.3.2 Mollusca (clams and snails)
A rather diverse collection of fossil mollusks was recovered from sedimentary deposits of the
Eocene-age Santiago Formation exposed on the project site. This collection can be divided into three
distinct assemblages including a brackish water estuarine assemblage, a more open marine estuarine
assemblage, and a marine continental shelf assemblage. The brackish water estuarine assemblage
occurred at only one locality (SDNHM Locality 5791) and is characterized by the following taxa:
Nerita triangulata, Calyptraea diegoana (small variety), Potamides carbonicola, Barbatia morsel,
and Pelecyora aequilateralis. The more open marine estuarine assemblage occurred at several
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 13
<x> i£t-" .-.v^s-*
Figure 4. Temporary exposure of fossiliferous sandstones of "Member B" of the Santiago Formation
at SDNHM Locality 5791 in the vicinity of fifth green in the southeastern portion of the
Carlsbad Municipal Golf Course project site.
localities and is characterized by the following taxa: Calyptraea diegoana (large variety),
Pycnodonte stewarti, Isognomon clarki, Spondylus carlosensis, Acanthocardia breweri, and
Crassatella uvasana (Figure 5). The marine continental shelf assemblage occurred at several
localities and is characterized by the following taxa: Ectinochilus macilentus, Ficopsis cooperiana,
Valuta martini, Area homii, Corbula parilis, Periploma eodiscus, Gari texta, Macrocallista
andersoni, Tellina spp. and Dentalium stentor.
A single internal mold of a rock boring clam (Family Pholadidae) was collected from the
Pleistocene-age Lindavista Formation (SDSNH Locality 5780).
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 14
3.3.3 Echinodermata (sea urchins, sand dollars, and sea stars)
Fragments of a small heart urchin (Schizaster diabloensis) were recovered from locality (SDNHM
Locality 5758) and occurred with the marine continental shelf molluscan assemblage described
above.
3.3.4 Chordata (fish, amphibians, reptiles, birds, and mammals)
A small assemblage of fossil vertebrates was recovered from the Carlsbad Municipal Golf Course
project site. Marine vertebrate fossils include a tooth of an extinct sand tiger shark (Striatolamia sp.)
and a partial tooth plate of a bat ray (Myliobatoidea). A partial right humerus (upper arm bone)
belonging to a large flying bird (Figure 6) tentatively assigned to the extinct family Pelagornithidae,
a member of the bird order Pelicaniformes. Preliminary analysis of this specimen by avian
paleontologists in Texas and Washington, D.C. suggests that it represents a bird with at least a 15
foot wing span and is probably a species new to science.
Paleontologies! Mitigation Report - Carlsbad Municipal Golf Course 15
Figure 5. Representative fossil invertebrates collected from the Carlsbad Municipal Golf Course
project site (scale bar in centimeters): a.) SDSNH 109889, Diodora stillwaterensis', b.)
SDSNH 109911, Acanthocardia (Schedocardid) brewerii ; c.) SDSNH 109949,
Spondylus carlosensis, d.) SDSNH 109943, Pycnodonte stewarti, e.) SDSNH
109800, Ectinochilus (Macilentos) macilentis, f.) SDSNH 109805, Ficopsis
cooperiana, g.) SDSNH 109842, Conus hornii, h.) SDSNH 109931, Ficus mamillata.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 16
Figure 6. Partial fossil bird right humerus (distal end) recovered from the Carlsbad Municipal
Golf Course project site (scale bar in centimeters). SDSNH 109699, Pelagornithidae.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 17
4.0 DISCUSSION
4.1 Introduction
The following section is limited to a general discussion of the results of the Carlsbad Municipal Golf
Course paleontological mitigation program in the broader context of southern California geology and
paleontology. Although academic research questions dictated the field methods and types of data
recorded, the overall goal of this mitigation program was not to produce a research paper, but rather
to discover and salvage significant fossil remains, record relevant stratigraphic and taphonomic data,
and curate and permanently house the salvaged fossil remains. The fossils recovered from the
Carlsbad Municipal Golf Course project site are now in a condition for scholarly research. The
important distinction is that the discovery, recovery, and conservation of the fossils are separate
endeavors from their study.
4.2 Geologic Setting
Along the coastal plain of San Diego County, basement rocks of the Jurassic-Cretaceous-age
Santiago Peak Volcanics and the Cretaceous-age Peninsular Ranges Batholith are nonconformably
overlain by sedimentary strata of late Cretaceous, Eocene, Oligocene, Miocene, Pliocene, and/or
Pleistocene age (Hanna, 1926; Kennedy, 1975; Kennedy and Moore, 1971; Kennedy and Peterson,
1975; Peterson and Kennedy, 1974; Walsh and Demere, 1991). In the vicinity of the Carlsbad
Municipal Golf Course project site, paleontologically sensitive sedimentary strata of the Eocene-age
Santiago Formation nonconformably overlie metavolcanic rocks of the Santiago Peak Volcanics and
are locally overlain by Pleistocene-age marine terrace deposits of the Lindavista Formation. The
contact between the Santiago Peak Volcanics and the Santiago Formation is irregular, and represents
an early Eocene or Paleocene-age eroded surface or landscape that was rapidly buried during middle
Eocene time by a sequence of marine, lagoonal, and fluvial sedimentary rocks. The contact between
the Santiago Formation and the Lindavista Formation is a planar erosion surface and represents an
early Pleistocene marine abrasion platform (sea floor).
The San Diego County coastal plain is characterized by a "stair-step" sequence of elevated marine
terraces (uplifted sea floors) and their associated marine and non-marine sedimentary covers (Kern
1977; Kern and Rockwell 1994). Generally speaking, these marine terraces and their sedimentary
deposits show a direct correlation between elevation and geologic age (i.e., the lowest terraces are the
youngest, while the highest terraces are the oldest (Kern and Rockwell, 1992). At the Carlsbad
Municipal Golf Course project site, the base of the marine terrace platform occurs at approximately
316 feet above sea level, suggesting correlation with either the Fire Mountain or Clairemont marine
terraces of Kern and Rockwell (1992). As discussed previously, for the purpose of this report, the
Pleistocene marine terrace deposits exposed within the Carlsbad Municipal Golf Course project site
are considered equivalent with the Lindavista Formation, which typically outcrops on marine terraces
further to the south.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 18
4.3 Stratigraphy and Paleontology
As discussed previously, grading operations at the Carlsbad Municipal Golf Course project site
exposed an approximately 300 foot thick sequence of marine and non-marine mudstone, siltstone,
sandstone, and conglomerate beds of the Eocene-age Santiago Formation (Figure 3), and an
approximately 10 foot thick sequence of nearshore marine and non-marine sandstone of the
Pleistocene-age Lindavista Formation (Tan and Kennedy, 1996).
4.3.1 Santiago Formation
Woodring and Popenoe (1945) proposed the name "Santiago Formation" to refer to the Eocene-age
sequence of fossiliferous marine siltstone and sandstone beds that crop out in the Santa Ana
Mountains in Orange County, California. These sedimentary deposits had previously been assigned
to the Tejon Formation (Dickerson, 1914; English, 1926; Woodford, 1925). Wilson (1972) detailed
lithostratigraphic and biostratigraphic similarities between the Santiago Formation in Orange County,
and a sequence of Eocene marine and nonmarine strata that crop out throughout the northwestern
portion of San Diego County. Based on these similarities Wilson (1972) assigned these strata in the
Oceanside and Carlsbad areas to the Santiago Formation. Wilson (1972) also subdivided the
formation into three informal members: a basal marine member ("Member A") composed
predominantly of green mudstone and sandy mudstone interbedded with blue tuffaceous sandstone
and lenticular concretionary sandstone; a middle marine member ("Member B") composed
predominantly of very fine- to medium-grained, moderately well cemented, arkosic sandstone; and a
nonmarine upper member ("Member C") composed of fine- to very coarse-grained, light gray to
white, friable, cross-bedded, arkosic sandstone that contains interbeds of greenish-brown siltstone,
silty mudstone, claystone, and scattered pebble and cobble conglomerate. The Eocene-aged
sedimentary deposits exposed on the Carlsbad Municipal Golf Course project site have been assigned
to the upper portion of "Member B" and to "Member C" of the Santiago Formation by museum
personnel. Sedimentary deposits of "Member C" of the Santiago Formation exposed on other project
sites in the vicinity of the Carlsbad Municipal Golf Course project area have yielded numerous
specimens of fossil land mammals that are characteristic of the late part of the Uintan North
American Land Mammal Age (NALMA; see discussion in Walsh, 1996).
Fossil invertebrates known to occur within the strata of "Member C" of the Santiago Formation
include inarticulate brachiopods, barnacles, ostracods, crabs, echinoderms, and a diverse molluscan
fauna that includes scaphopods, roughly 15 genera of gastropods, and 30 genera of pelecypods.
Fossils of marine vertebrates recovered from "Member C" include teeth of cartilaginous fish (sharks,
skates, and rays) and teeth and otoliths of bony fish (unpublished SDSNH paleontological data).
Terrestrial vertebrates including fossil reptiles, birds, and mammals have also been recovered from
the near shore marine facies of "Member C" of the Santiago Formation. The fossil reptile fauna
includes specimens of lizards, snakes, tortoises, soft-shelled turtles, and crocodiles. The fossil
mammal fauna includes artiodactyls such as Leptoreodon, Protylopus and Protoreodon;
perissodacryls such as the rhinoceros Amynodon sp., the tapir Dilophodon sp., and the brontotheres
Duchesneodus sp. and Metarhinus sp.; carnivorous mammals include the creodonts Apataelurus sp.,
Limnocyon sp., and Hyaenodon sp., and the miacids (eucarnivores) Miacis sp., Miocyon sp.,
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 19
Plesiomiacis sp., Procynodictis sp. Small mammals (represented by fragmentary jaws and isolated
teeth) such as bats, insectivores, and rodents have also been recovered from this highly sensitive unit
(unpublished SDSNH paleontological data).
As exposed on the Carlsbad Municipal Golf Course project site the Santiago Formation records a
period of rising and falling sea levels with brackish water estuarine conditions represented by the
strata of "Member B," more open marine estuarine conditions represented by the strata of Units 1 and
2 of "Member C," marine continental shelf conditions represented by the strata of Unit 3 of "Member
C," and a return to open marine estuarine conditions represented by the strata of Unit 4 of "Member
C." This transgressive-regressive stratigraphic sequence is broadly correlative with the middle
Eocene strata of the Poway Group as exposed in the metropolitan San Diego area. Specifically, Unit
1 of "Member C" is correlative with the Stadium Conglomerate, Unit 2 of "Member C" is correlative
with the basal part of the Mission Valley Formation, Unit 3 of "Member C" is correlative with the
lower part of the Mission Valley Formation, and Unit 4 is correlative with the upper part of the
Mission valley Formation.
4.3.2 Lindavista Formation
The Eocene-age strata exposed on the Carlsbad Municipal Golf Course project site are
unconformably overlain by a 10 foot thick sequence of Pleistocene-age marine terrace deposits
(Lindavista Formation). The Lindavista Formation and other Pleistocene marine terrace deposits in
San Diego County were deposited on a stair-step series of marine abrasion platforms (marine
terraces) that represent successive Pleistocene high sea levels. The ages of the deposits resting on
these terraces increases from west to east and are estimated to range from approximately 510,000 to
1.3 million years old (Kern and Rockwell, 1992).
Fossil localities are relatively rare in the Pleistocene-age Lindavista Formation, and have only been
reported from a few areas in San Diego County; mainly in the vicinity of Tierrasanta and Mira Mesa.
Fossils previously recovered from the Lindavista Formation include: nearshore marine invertebrates
such as scallops, snails, barnacles, and sand dollars; and sparse remains of sharks and baleen whales
(Demere and Walsh, 1993). Pleistocene marine terrace deposits including the Lindavista Formation
consist of both a basal near-shore marine unit and an upper non-marine unit. Although fossils are
relatively uncommon in the Lindavista Formation, the basal units of younger marine terrace deposits
(e.g., the Bay Point Formation) have produced large and diverse assemblages of marine invertebrate
fossils such as mollusks, crustaceans, and echinoids (Emerson and Chase 1959; Grant and Gale 1931;
Kern 1977; Stephens 1929; Valentine 1960, 1961), as well as sparse remains of marine vertebrates
such as sharks, rays, and bony fish (Jefferson 1991). The upper units of these younger marine terrace
deposits have produced sparse remains of terrestrial mammals such as camel, horse, and mammoth
(Hertlein and Grant 1944).
4.4 Geologic Age
The absolute age of the Santiago Formation as exposed on the Carlsbad Municipal Golf Course
project site is not precisely known. Fossils recovered elsewhere from "Member B" strata of the
Santiago Formation include remains of terrestrial mammals characteristic of the early part of the
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 20
Uintan North American Land Mammal Age. This correlation indicates an absolute age of
approximately 46 million years for these deposits (Robinson et al., 2004). Fossils recovered
elsewhere in San Diego County from "Member C" strata of the Santiago Formation include remains
of terrestrial mammals characteristic of the later part of the Uintan North American Land Mammal
Age. This correlation indicates an absolute age of approximately 42 million years for the these
deposits (Walsh 1996). Several of the fossil mollusk species recovered from Unit 3 of "Member C"
are characteristic of molluscan faunas assigned to the "Domengine Stage" of West Coast molluscan
biochronology. As reported by Givens and Kennedy (1979), the "Domengine Stage" is correlated
with the early part of the middle Eocene.
At the Carlsbad Municipal Golf Course project site, the age of the Lindavista Formation can be
estimated based on the elevation of its erosional contact (marine terrace platform) with the
underlying Santiago Formation. This contact occurs at approximately 316 feet above sea level,
suggesting correlation with either the Fire Mountain or Clairemont marine terraces of Kern and
Rockwell (1992). Estimates for the age of these terraces is 630,000 and 698,000 years, respectively.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 21
5.0 CONCLUSIONS
The paleontological resource mitigation program conducted for the Carlsbad Municipal Golf Course
project site reduced adverse impacts on paleontological resources to below the level of significance
through construction monitoring, fossil salvage, fossil preparation, and fossil curation. This work
resulted in the recovery of scientifically significant paleontological resources from 15 localities
discovered within sedimentary deposits of the Eocene-age Santiago Formation, and one locality
discovered within Pleistocene-age sedimentary deposits equivalent to the Lindavista Formation.
Fossils recovered from the Carlsbad Municipal Golf Course project site include specimens of fossil
brackish-water estuarine clams and open marine clams and snails, marine sharks and rays, and bird.
The bird fossil is especially significant and may represent a species new to science. The overall
Eocene stratigraphic sequence exposed on the project site represents a series of transgressive and
regressive strata that is broadly correlative with the Poway Group strata exposed in the metropolitan
San Diego area. The Eocene strata (i.e., "Member B") are approximately 46 million years old, while
strata of "Member C" are approximately 42 million years old.
The recovery of these assemblages of Eocene- and Pleistocene-age fossils represents a significant
contribution to the study of ancient life in southern California. The preservation of these fossils and
their storage in perpetuity at the San Diego Natural History Museum will ensure their availability to
future generations of citizens, students, and professional scientists.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 22
6.0 REFERENCES
Demere, T. A. and S. L. Walsh, 1993. Paleontological Resources, County of San Diego. Prepared for
the San Diego Planning Commission: 1-68.
Dickerson, R. E. 1914. The Martinez and Tejon Eocene and associated formations of the Santa Ana
Mountains. University of California Publications in Geological Sciences, v. 8, p. 257-274.
Emerson, W.K., and E.P. Chace. 1959. Pleistocene mollusks from Tecolote Creek, San Diego,
California. San Diego Society of Natural History, Transactions 12:335-345.
English, W. A. 1926. Geology and resources of the Puente Hills region, southern California. U.S.
Geological Survey Bulletin, v. 768, 1-110.
Grant, U.S., IV, and H.R. Gale. 1931. Catalogue of the marine Pliocene and Pleistocene Mollusca of
California. San Diego Society of Natural Histroy, Memoir 1:1-878.
Hanna, M. A., 1926. Geology of the La Jolla Quadrangle, California. University of California
Publications in Geological Sciences, v. 16 (7), p. 187-246.
Hertlein, L.G., and U.S. Grant, IV. 1944. The geology and paleontology of the marine Pliocene of
San Diego, California, Part 1, Geology. San Diego Society of Natural History, Memoir 2:1-
72.
Jefferson, G.T. 1991. A catalog of late Quaternary vertebrates from California. Natural History
Museum of Los Angeles County, Technical Reports 7:1-129.
Kennedy, M. P. 1975. Geology of the San Diego metropolitan area, California. Section A - Western
San Diego metropolitan area. California Division of Mines and Geology, Bull. 200: 9-39.
Kennedy, M. P. and G. W. Moore. 1971. Stratigraphic relations of upper Cretaceous and Eocene
formations, San Diego coastal area, California. American Association of Petroleum
Geologists, Bulletin 55: 709-722.
Kennedy, M. P., and Peterson, 1975. Geology of the San Diego metropolitan area, California.
Section B - Eastern San Diego metropolitan area. California Division of Mines and Geology,
Bull. 200: 42-56.
Kern, J.P. 1977. Origin and history of upper Pleistocene marine terraces, San Diego, California.
Geological Society of America, Bulletin 88:1553-1566.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 23
Kern, J.P., and T.K. Rockwell. 1992. Chronology and deformation of Quaternary marine shorelines,
San Diego County, California. In: Quaternary Coasts of the United States: Marine and
Lacustrine Systems. Society of Economic Paleontologists and Mineralogists, Special
Publication 48:377-3 82.
Peterson, G. L., and M. P. Kennedy. 1974. Lithostratigraphic variations in the Poway Group near San
Diego, California. San Diego Society of Natural History Transactions 17: 251-8.
Robinson, P., Gunnell, G.F., Clyde, W., Froehlich, D., Walsh, S.L., Storer, J., Srucky, R. K.,
Ferrusquia-Villafranca, I., McKenna, M.C., and Flynn, J.J. 2004. Wasatchian through
Duchesnean biochronology of North America. In: M.O. Woodburne (ed.), Late Cretaceous
and Cenozoic Mammals of North America: Geochronology and Biostratigraphy, 2nd edition.
Columbia University Press, New York.
Stephens, F. 1929. Notes on the marine Pleistocene of San Diego County, California. San Diego
Society of Natural History, Transactions 5:245-256.
Tan, S. S., and Kennedy, M. P., 1996. Geologic maps of the northwestern part of San Diego,
California: California Division of Mines and Geology Open-File Report 96-02, 2 sheets
(scale 1:24,000).
Valentine, J.W. 1960. Habitats and sources of Pleistocene mollusks at Torrey Pines Park, California.
Ecology 41:161-165.
Valentine, J.W. 1961. Paleoecologic molluscan geography of the California Pleistocene. University
of California Publications in Geological Sciences 34:309-442.
Walsh, S. L., 1996. Middle Eocene mammal faunas of San Diego County, California. In: D. R.
Prothero and R. J. Emry (eds.). the Terrestrial Eocene-Oligocene Transition in North
America. Cambridge University Press, Cambridge England, pp. 75-119.
Walsh, S. L., and T. A. Demere. 1991. Age and stratigraphy of the Sweetwater and Otay formations,
San Diego County, CA. In, P. L. Abbott and J. A. May (eds.), Eocene Geologic History San
Diego Region. Society of Economic Mineralogists and Paleontologists, Pacific Section 68:
131-148.
Wilson, K. L. 1972. Eocene and related geology of a portion of the San Luis Rey and Encinitas
quadrangles, San Diego County, California. Unpubl. M. Sc. Thesis, University of California,
Riverside.
Woodford, A. O. 1925. The San Onofre Breccia, it nature and origin. University of California
Publications in Geological Sciences, v. 15 (7), p. 187-246.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 24
Woodring, W. P., and Popenoe, W. P. 1945. Paleocene and Eocene stratigraphy of northwestern
Santa Ana Mountians, Orange County, California. U. S. Geological Survey Oil and Gas
Investigations Preliminary Chart 12.
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 25
APPENDICES
Paleontological Mitigation Report - Carlsbad Municipal Golf Course 26
DATE 08/08/06
TIME 18:48:52
LOCALITY # LOCALITY NAME
5758 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TUNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 163 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
See Below
LOCALITY #- 5758
LATITUDE 33° 7'32"N VARIANCE
LONGITUDE 117°17'53"W
UTM 11 472185 3665036 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD1927
MAP SOURCE USGS 1968(1975)
STRATIGRAPHIC POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, Unit 3
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
mdst
CITATION
DEPOSITIONAL ENVIRONMENT
DONATED BY
City of Carlsbad 20 Dec 2005
FIELD NOTES
CMR#1 p125-137
COLLECTOR
Cory M. Redman 19 Dec 2005
COMPILED BY
Corey M. Redman 13 Feb 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Burgess 20 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during pa Ieontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5.
The fossil producing horizon is a lense of silt 4' x 1' x .5' thick. The lense consists of light olive gray (5Y5/2), very well sorted, well rounded,
upward coarsing (reverse grading), massive, well cemented, flat lying mudstone. The underlying contact is sharp and the overlying contact is gradational.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 51 to 71 thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and'consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 51. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40t of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20" thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15" thick.
Fossils were hand quarried with a rock hammer and awl, and consolidated with vinac.
Recovered fossils include well preserved molds and casts of invertebrates packed in a matrix supported lense.
The locality was graded away.
Field Numbers: CMR19DEC05-1, CMR20DEC05-1
Dates Collected: 19 Dec 2005, 20 Dec 2005
LOCALITY 5758
DATE 08/08/06
TIME 18:40:40
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5758
Carlsbad City Golf Course
PAGE 1
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109790
109791
109792
109793
109794
109795
109796
109797
109798
109799
109800
109801
109802
109803
109804
109805
109806
109807
109808
109809
109810
109811
109812
109813
109814
109815
109816
109817
109818
109819
109820
109821
109822
109823
109824
2
2
4
1
3
2
2
2
2
2
7
2
2
4
1
2
2
1
1
2
2
5
14
3
2
2
2
2
19
6
3
2
1
1
6
steinkerns, partial, and mold
steinkern & mold, part-counterpart
molds and steinkerns
steinkern, partial, poorly preserved
steinkerns, juveniles
steinkern & mold, part-counterpart
steinkern and mold
steinkern & mold, part-counterpart
steinkern & mold, part-counterpart
steinkern & mold, part-counterpart
steinkerns, whole and partial
steinkern and mold
steinkern & mold, part-counterpart
steinkerns
steinkern
steinkern & mold, part-counterpart
steinkern and mold
steinkern, partial
steinkern
steinkern & mold,valve, part-counterpart
steinkern & mold, valve,part-counterpart
steinkerns, valves, left and right
steinkerns and mold, valves
steinkerns, valves, left & right, & pair
steinkern & mold, valve,part-counterpart
steinkern & mold, valve, partial
steinkerns, valves
steinkerns, valves,
steinkerns & molds,
steinkerns & molds.
left and right
valves and pairs
valves & pair,3 sets
steinkerns, valves, left and right
steinkern & mold, valve
steinkern, valve
steinkern, valve
steinkerns & mold, valves
Turritella uvasana Conrad, 1855
Turritella uvasana Conrad, 1855
Turritella uvasana Conrad, 1855
cf. Cerithidea sp.
Calyptraea diegoana (Conrad, 1855)
Ectinochilus (Macilentos) macilentus (White, 1889)
Ectinochilus (Macilentos) macilentus (White, 1889)
Ectinochilus (Macilentos) macilentus (White, 1889)
Ectinochilus (Hacilentos) macilentus (White, 1889)
Ectinochilus (Macilentos) macilentus (White, 1889)
Ectinochilus (Macilentos) macilentus (White, 1889)
cf. Neverita sp.
cf. Neverita sp.
cf. Neverita sp.
cf. Galeodea sp.
Ficops is cooperiana Stewart, 1927
cf. Siphonalia sp.
cf. Siphonalia sp.
Gastropoda?
Ac iI a decisa (Conrad, 1855)
Ac iI a decisa (Conrad, 1855)
Ac iI a decisa (Conrad, 1855)
Nuculana sp%
Area hornii Gabb, 1864
Brachidontes cowlitzensis (Weaver & Palmer, 1922)
Brachidontes cowlitzensis (Weaver & Palmer, 1922)
Brachidontes cowlitzensis (Weaver & Palmer, 1922)
Venericardia sp.
Pi tar sp.
Pi tar sp.
Tellina sp. cf. T. vorbei Hanna, 1927
Gari texta Gabb, 1864
Gari texta Gabb, 1864
Corbula harrisi Dickerson, 1915
Corbula sp. cf. C. pan'I is Gabb, 1864
DATE 08/08/06
TIME 18:40:41
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5758
Carlsbad City Golf Course
PAGE 2
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109825
109826
109827
109828
109829
109830
109831
109832
3 steinkern & mold, valves
3 steinkern & molds, pair,part-counterpart
2 steinkern & mold, pair, part-counterpart
2 steinkern & mold, pair, part-counterpart
2 steinkerns, valves, left and right
3 steinkerns
2 steinkern and mold, fragment
2 burrows in matrix
Periploma sp. cf. P. eodiscus Vokes, 1939
Periploma sp. cf. P. eodiscus Vokes, 1939
Periploma sp. cf. P. eodiscus Vokes, 1939
Periploma sp. cf. P. eodiscus Vokes, 1939
Thracia sorrentoensis Hanna, 1927
Dentalium stentor Anderson & Hanna, 1925
Schizaster diabloensis Kew, 1920
Diopatrichnus roederensis Kern, 1978
DATE 08/08/06
TIME 18:43:16
LOCALITY # LOCALITY NAME
5759 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TUNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 122 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
CMR21DEC05-1
LOCALITY #- 5759
LATITUDE 33° 7'30"N
LONGITUDE 117°17'57"W
VARIANCE
UTM 11 472088 3664996 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, Unit 3
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
DONATED BY
City of Carlsbad 21 Dec 2005
FIELD NOTES
CMR#1 p125-137
COLLECTOR
Corey M. Redman 21 Dec 2005
COMPILED BY
Corey M. Redman 13 Feb 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Burgess 20 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during pa Ieontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5.
The fossil producing horizon is a localizes deposit 3.5' thick by 5' across within a continuous bed of dusky yellow (5Y6/4), very well sorted, rounded,
upward fining (normal grading), massive, moderatelly cemented, flat lying fine- grained sandstone. The contacts with adjacent units were not observed.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 51 to 71 thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite G'ravels") is the lowest and coarsest at around 50' in thickness'and consists of very coarse-grained, poorly sorted sandstones'and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40t of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were hand quarried with a rock hammer and consolidated with vinac.
Recovered fossils include well preserved molds and casts of invertebrates packed in a matrix supported bed.
The locality was graded away.
LOCALITY 5759
DATE 08/08/06
TIME 18:40:35
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5759
Carlsbad City Golf Course
PAGE 1
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109833
109834
109835
109836
109837
109838
109839
109840
109841
109842
109843
109844
109845
109846
109847
109848
109849
109850
109851
109852
109853
109854
. 109855
109856
109857
109858
109859
109860
109861
109862
109863
2 steinkerns
3 steinkerns, partial
1 steinkern, on matrix
2 steinkern & partial mold
3 steinkerns and mold, partial
1 steinkern, partial
1 steinkern, partial, on matrix
1 steinkern
1 steinkern, in matrix
6 steinkerns
1 steinkern
3 steinkerns, partial
1 mold, fragment
2 steinkerns, valves, left
3 steinkerns, valves
1 molds with valve fragments
2 mold & steinkern, valve,part-counterpart
1 steinkern, pair
1 steinkern, valve, partial
1 steinkern, valve
4 steinkerns, valves, left and right
2 steinkern & mold, valves
2 steinkern and mold, valve, left
1 steinkern, valve, left
19 steinkerns & mold, valves, left & right
1 steinkern, valve, left
2 steinkerns, valves, right
1 steinkern, valve
6 steinkerns and mold
2 steinkern & mold, valve,part-counterpart
2 steinkern, valve, partial, & mold
Turritella uvasana Conrad, 1855
Calyptraea diegoana (Conrad, 1855)
Ectinochilus (Macilentos) macilentus (White, 1889)
Natica sp.
Ficopsis cooperiana Stewart, 1927
cf. Strepsidura sp.
Pseudoperissolax blakei (Conrad,
cf. Siphonalia sp.
Neogastropoda
Conus horni i Gabb, 1864
Turridae?
Voluta martini Dickerson, 1915
Pulmonata?
Nuculana sp.
Area horni i Gabb, 1864
Ostrea sp.
Ostrea sp.
Crassatella uvasana Conrad, 1855
Claibornites diegoensis (Dickerson, 1916)
Acanthocardia (Schedocardia) brewerii (Gabb, 1864)
Pi tar sp.
Macrocallista andersoni Dickerson, 1915
Macrocallista andersoni Dickerson, 1915
Macrocallista andersoni Dickerson, 1915
Macrocallista andersoni Dickerson, 1915
Callista horni i (Gabb, 1864)
Tellina sp. cf. T. soledadensis Hanna, 1927
Tel Una sp.
Gari texta Gabb, 1864
Gari texta Gabb, 1864
Solena (Eosolen) novacularis (Anderson & Hanna, 1928)
DATE 08/08/06
TIME 18:44:09
LOCALITY # LOCALITY NAME
5762 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 280 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR16Sep05-1
LOCALITY #- 5762
LATITUDE 33° 7'46"N
LONGITUDE 117°17'25"W
VARIANCE
UTM 11 472933 3665472 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member B
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sltst
CITATION
DEPOSITIONAL ENVIRONMENT
marine
DONATED BY
City of Carlsbad 16 Sep 2005
FIELD NOTES
BORbk:30 pgs.44,45,53
COLLECTOR
Brad 0. Riney 16 Sep 2005
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during paleontologies I monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5762 was discovered approximately 240' south of the meridan station 36+00
of College Avenue and 800' southwest of the intersection of College Avenue and Palomar Point Street. See page 18 of the grading plan book.
Fossils were collected from a yellowish grayish greenish siltstone.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 51 to 7' thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
j Fossils were collected by quarrying.
• Fossils recovered include mostly Isognomon and Anomia. Isognomon occurred articulated and as single valves randomly deposited in no particular
j orientation.
| The locality has been graded away.
j LOCALITY 5762
DATE 08/08/06
TIME 18:39:37
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5762
Carlsbad City Golf Course
SPECIES
PAGE 1
PAL270
109864
109865
109866
109867
109868
109869
2
30
2
1
4
1
steinkern & mold, part, part-counterpart
steinkerns
steinkerns, valves
valve, whole, right, juvenile
steinkerns, valves, miscellaneous
steinkern, valve, right
Turritella uvasana Conrad, 1855
Calyptraea diegoana (Conrad, 1855)
Barbatia morsel Gabb, 1864
Pycnodonte Stewarti Hanna, 1927
Veneridae
Corbula sp. cf. C. pan'I is Gabb, 1864
DATE 08/08/06
TIME 18:44:10
LOCALITY # LOCALITY NAME
5763 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 285 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR26Sep05-1
LOCALITY #- 5763
LATITUDE 33° 7'47"N VARIANCE
LONGITUDE 117°17'28"W
UTM 11 472842 3665511 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member B
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine
DONATED BY
City of Carlsbad 26 Sep 2005
FIELD NOTES
BORbk:30 pgs.44,45,53
COLLECTOR
Brad 0. Riney 26 Sep 2005
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during paleontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5763 was discovered approximately 350' northwest of the Golf Course
Maintenance Building at the end of Palomar Oaks Way.
Fossils were collected from a rusty yellow to yellow, fine-grained massive sandstone in a nearly friable condition.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 5' to 7" thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-fiI ling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels")' is the lowest and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 51 of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were collected by hand quarrying.
Fossils recovered include mostly Isognomon and Anomia. Other taxa were present, but due to extreme weathering were not preserved enough to identify.
The locality has been covered with vegetation and is no longer accessible.
LOCALITY 5763
DATE 08/08/06
TIME 18:39:44
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5763
Carlsbad City Golf Course
SPECIES
PAGE 1
PAL270
109870
109871
109872
109873
109874
109875
109876
109877
109878
109879
109880
109881
109882
109883
1 impression of corallite
3 steinkerns
1 steinkern
1 steinkern, valve, partial, on matrix
2 steinkern & partial mold, pair
6 steinkerns, valves, left, and pair
1 shell, partial, hinge area, very worn
2 valves, whole & partial, left
1 steinkern & mold, valve,part-counterpart
3 steinkerns, valves, left and right
2 steinkern & mold, valve, partial
1 steinkern, valve, partial
1 steinkern, valve
1 spine?, partial and worn
Scleractinia
Calyptraea diegoana (Conrad, 1855)
Neogastropoda
cf. Solemya sp.
Nuculana sp.
Nuculana sp.
Isognomon clarki (Effinger, 1938)
Anomia sp. cf. A. mcgoniglensis Hanna, 1927
Acanthocardia (Schedocardia) breweri i (Gabb, 1864)
cf. Pitar sp.
Cal lista sp.
Solena (Eosolen) novacularis (Anderson & Hanna, 1928)
cf. Tellina sp.
Echinodermata?
DATE 08/08/06
TIME 18:44:11
LOCALITY # LOCALITY NAME
5764 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 287 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR15Sep05-1
LOCALITY #- 5764
LATITUDE 33° 7'43"N VARIANCE
LONGITUDE 117°17'28"W
UTH 11 472845 3665402 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD 1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member B
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine
DONATED BY
City of Carlsbad 15 Sep 2005
FIELD NOTES
BORbk:30 pgs.44
COLLECTOR
Brad 0. Riney 15 Sep 2005
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during pa Ieontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5764 was discovered approximately 350' northwest of the Golf Course
Maintenance Building at the end of Palomar Oaks Way. Locality 5764 was collected from the same bed as Icoality 5763.
Fossils were collected from a rusty yellow to yellow, fine-grained massive sandstone in a nearly friable condition.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 5' to 7' thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-fiUing
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in th'ickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were collected by hand quarrying.
Fossils recovered include mostly Anomia. Other taxa were present, but due to extreme weathering were not preserved enough to identify.
The locality has been covered with vegetation and is no longer accessible.
LOCALITY 5764
DATE 08/08/06
TIME 18:39:53
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5764
Carlsbad City Golf Course
PAGE 1
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109884
109885
109886
109887
109888
1 steinkern
3 valves, right, juvenile
30 fragments of left valves
2 steinkern, pair, and partial valve
1 steinkern & mold, valves, in matrix
Naticidae
Pycnodonte Stewarti Hanna, 1927
Anomia sp. cf. A. mcgoniglensis Hanna, 1927
Veneridae
cf. Tellina sp.
DATE 08/08/06
TIME 18:44:12
LOCALITY # LOCALITY NAME
5765 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 104 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR01Dec05-1
LOCALITY #- 5765
LATITUDE 33° 7'51"N VARIANCE
LONGITUDE 117°17'49"W
UTH 11 472302 3665624 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD 1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, unit 1
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine shelf
DONATED BY
City of Carlsbad 1 Dec 2005
FIELD NOTES
BORbk:30 pgs.76,86
COLLECTOR
Brad 0. Riney 1 Dec 2005
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during pa Ieontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5765 was discovered approximately 640' west of meridian station 28+OOof
College Avenue. See page 19 of the grading plans book.
Fossils were collected from a light gray (N6), poorly sorted, very coarse-grained, massive sandstone. This sandstone bed has been informally named
Santiago C unit 1 or Ts-C.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 5' to 7' thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have t'heir own designations. Unit 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were collected by hand quarrying.
Fossils recovered include poorly preserved steinkerns of both single valves and articulated bivalves of the genus Miltha.
The locality has been covered with vegetation and is no longer accessible.
LOCALITY 5765
DATE 08/08/06
TIME 18:40:00
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5765
Carlsbad City Golf Course
PAGE 1
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109924 molds, valves, part-counterpart of pair Miltha packi (Dickerson, 1916)
DATE 08/08/06
TIME 18:44:32
LOCALITY # LOCALITY NAME
5766 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 120 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR01Dec05-2
LOCALITY #- 5766
LATITUDE 33° 7'50"N VARIANCE
LONGITUDE 117°17148"W
UTM 11 472338 3665613 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD 1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, unit 2
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine shelf
DONATED BY
City of Carlsbad 1 Dec 2005
FIELD NOTES
BORbk:30 pgs.76,86
COLLECTOR
Brad 0. Riney 1 Dec 2005
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during pa Ieontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5766 was discovered approximately 600' northwest of College Avenue
meridian station 28+00. See page 19 of the grading plans book.
Fossils were collected from a cemented, gray, fine-grained, massive sandstone.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 51 to 71 thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels") is the lowest' and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were collected by hand quarrying.
Fossils recovered include articulated Isognomon and Ostrea.
The locality has been covered with vegetation and is no longer accessible.
LOCALITY 5766
DATE 08/08/06
TIME 18:40:05
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5766
Carlsbad City Golf Course
SPECIES
PAGE 1
PAL270
109889
109890
109891
109892
109893
109894
109895
1
4
4
2
1
1
1
mold, on matrix, has some shell material
steinkerns, pairs, with some shell
valves, partial, and steinkern
valve, whole, right, and steinkern
valve, fragment, in matrix
steinkern, valve, whole, left
burrow cast, fragment
Diodora stiIIwaterensis (Weaver & Palmer, 1922)
Isognomon clarki (Effinger, 1938)
Pycnodonte Stewarti Hanna, 1927
Pycnodonte Stewarti Hanna, 1927
Spondylus carlosensis Anderson, 1905
Anomia sp. cf. A. mcgoniglensis Hanna, 1927
Ophiomorpha
DATE 08/08/06
TIME 18:44:45
LOCALITY # LOCALITY NAME
5767 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 155 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR01Dec05-3
LOCALITY #- 5767
LATITUDE 33° 7'48"N VARIANCE
LONGITUDE 117°17I47"W
UTM 11 472363 3665552 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD 1927
MAP SOURCE USGS 1968(1975)
STRATIGRAPHIC POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, unit 3
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine shelf
DONATED BY
City of Carlsbad 1 Dec 2005
FIELD NOTES
BORbk:30 pgs.76,86
COLLECTOR
Brad 0. Riney 1 Dec 2005
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during paleontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5767 was discovered approximately 500' west of the College Avenue
meridian station 28+00. See page 19 of the grading plans book.
Fossils were collected from a greenish yellowish gray, silty, fine-grained massive sandstone.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 5' to 7' thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels^') is the lowest and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5t of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were collected by hand quarrying.
Fossils recovered include a few steinkerns of bivalves and an occasional gastropod. The bivalves were of random single isolated elements.
The locality has been covered with vegetation and is no longer accessible.
LOCALITY 5767
DATE 08/08/06
TIME 18:40:59
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5767
Carlsbad City Golf Course
SPECIES
PAGE 1
PAL270
109896
109897
109898
109899
109900
109901
109902
109903
109904
109905
1
2
1
2
1
2
2
2
1
2
mold, together with Ectinochilus mold
steinkerns, partial
steinkern
steinkerns
mold
steinkern, valve, left, and pair
steinkern & mold, pair, part-counterpart
steinkern & mold, valve, right
mold, valve, left
steinkern and mold
cf. Bittium sp.
Ectinochilus (Macilentos) macilentus (White, 1889)
cf. Teionia sp.
Naticidae
Voluta martini Dickerson, 1915
Nuculana sp.
Pi tar sp.
Macrocallista andersoni Dickerson, 1915
Macrocallista andersoni Dickerson, 1915
Dentalium stentor Anderson & Hanna, 1925
DATE 08/08/06
TIME 18:44:59
LOCALITY # LOCALITY NAME
5768 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 148 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT Of PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR10Jan06-1
LOCALITY #- 5768
LATITUDE 33° 7'29"N
LONGITUDE 117017'53"W
VARIANCE
UTM 11 472206 3664959 VARIANCE
MAP NAME Encinitas, CA
MAP SCALE 1:24000 DATUM NAD 1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, unit 2
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine shelf
DONATED BY
City of Carlsbad 10 Jan 2006
FIELD NOTES
BORbk:30 pgs.77,81
COLLECTOR
Brad 0. Riney 10 Jan 2006
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during paleontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5768 was discovered approximately 1100' east of the southeast corner of
College Avenue and Palomar Airport Road and 450' due north of station 89+00 of the median of Palomar Airport Road. See page 6 of the grading plans book.
Fossils were collected from a light yellow, fine-grained, massive sandstone, ppartly induarted. Localities 5766, 5769, and 5770 also occur within this
bed. This 20' thick bed has been informally assigned the name "Santiago C unit 2" or "Ts-C2".
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10" thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 51 to 7' thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which' were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown sittstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were collected using the "pluck and run" technique.
Fossils recovered include Ostrea, Isognomon, Crassatella, several species of gastropods, and several species of pelecypods. Many of the large oysters
were attached to each other and to other large bivalves such as Isognomon species.
The locality has been graded away.
LOCALITY 5768
DATE 08/08/06
TIME 18:40:12
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5768
Carlsbad City Golf Course
SPECIES
PAGE 1
PAL270
109906
109907
109908
109909
109910
109911
109912
109913
109914
109915
109916
1 mold, partial
1 steinkern, partial
1 steinkern, partial
7 valves, right, whole, left, partial
4 steinkerns and shell, pairs, partial
4 steinkerns, valves
1 steinkern, pair
1 steinkern, pair
2 steinkerns, valves, left and right
1 steinkern, valve
1 tooth, in matrix
Turritella uvasana Conrad, 1855
Ficus mamillata Gabb, 1864
Neogastropoda?
Pycnodonte stewarti Hanna, 1927
Crassatella uvasana Conrad, 1855
Acanthocardia (Schedocardia) brewerii (Gabb, 1864)
cf. Mareia bunkeri (Hanna, 1927)
Macrocallista andersoni Dickerson, 1915
Callista sp. cf. C. hornii (Gabb, 1864)
Gari sp. cf. G. texta Gabb, 1864
Myliobatoides
f'f
DATE 08/08/06
TIME 18:45:12
LOCALITY # LOCALITY NAME
5769 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 112 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR05Dec05-1
LOCALITY #- 5769
LATITUDE 33° 7'31"N VARIANCE
LONGITUDE 117°17'58"W
UTH 11 472070 3665015 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, unit 2
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine shelf
DONATED BY
City of Carlsbad 5 Dec 2005
FIELD NOTES
BORbk:30 pgs.77,81
COLLECTOR
Brad 0. Riney 5 Dec 2005
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during paleontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5769 was discovered approximately 320' northeast of the northeast corner
of the intersection of Palomar Airport Road and College Avenue. See page 5 of the grading plans book.
Fossils were collected from a yellow, fine-grained, partly cemented shell bed in the upper part of a 20' thick sandstone bed. The bed occurs in the
lower part of the Santiago Formation and is the 2nd unit from the base. Localities 5766, 5768, and 5770 also occur within this bed. This sandstone bed is
informally called "Santiago C unit 2" or "Ts-C2".
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 5' to 7' thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 576*2, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were collected using the "pluck and run" technique and by hand quarrying.
Fossils recovered include Ostrea, Isognomon, Spondylus, Crassatella, Ficus, and Diodora. Many of the large oysters were attached to each other and to
other large bivalves such as Isognomon species.
The locality has been covered with vegetation and is no longer accessible.
LOCALITY 5769
DATE 08/08/06
TIME 18:40:20
SPECIMEN NUMBER OF
NUMBER ITEMS
109917
109918
109919
109920
109921
109922
109923
DESCRIPTION
steinkern & partial mold, very large
steinkern, in matrix
valves, whole, left and right
two pairs (one with valves separate)
steinkern, pair, very large
steinkern, valve, partial, right
steinkern, valve, partial
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT Of PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5769
Carlsbad City Golf Course
SPECIES
Calyptraea diegoana (Conrad, 1855)
cf. Pleurofusia sp.
Pycnodonte Stewarti Hanna, 1927
Pycnodonte stewarti Hanna, 1927
Isognomon clarki (Effinger, 1938)
Venericardia horni i (Gabb, 1864)
Acanthocardia (Schedocardia) breweri i (Gabb, 1864)
PAGE 1
PAL270
DATE 08/08/06
TIME 18:45:26
LOCALITY # LOCALITY NAME
5770 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TUNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 138 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR07Dec05-1
LOCALITY #- 5770
LATITUDE 33° 7'28"N VARIANCE
LONGITUDE 117°17'53"W
UTM 11 472206 3664924 VARIANCE
MAP NAME Encinitas, CA
MAP SCALE 1:24000 DATUM NAD 1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, unit 2
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine shelf
DONATED BY
City of Carlsbad 7 Dec 2005
FIELD NOTES
BORbk:30 pgs.77,81
COLLECTOR
Brad 0. Riney 7 Dec 2005
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during paleontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5770 was discovered approximately 800' east of the southeast corner of
the intersection of College Avenue and Palomar Airport Road.
Fossils were collected from a yellow, fine-grained, partly cemented shell bed in the upper part of a 20' thick marine sandstone bed. Localities 5766,
5768, and 5769 also occur within this bed. This sandstone bed is informally called "Santiago C unit 2" or "Ts-C2".
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 5' to 71 thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 71 across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were collected using the "pluck and run" technique and by hand quarrying.
Fossils recovered include Ostrea, Isognomon, Spondylus, Crassatella, and Ficus. Many of the large oysters were articulated and were attached to each
other and to other large bivalves such as Isognomon species.
The locality has been covered with vegetation and is no longer accessible.
LOCALITY 5770
DATE 08/08/06
TIME 18:40:27
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5770
Carlsbad City Golf Course
PAGE 1
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109699
109700
109925
109926
109927
109928
109929
109930
109931
109932
109933
109934
109935
109936
109937
109938
109939
109940
109941
109942
109943
109944
109945
109946
109947
109948
109949
109950
109951
109952
109953
109954
109955
109956
109957
3 humerus, right, distal end
1 femur, distal condyle & shaft impression
1 steinkern
1 shell, whole, worn
1 steinkern, whole
3 steinkerns, on matrix, very large
1 steinkern
1 steinkern
2 steinkern & partial mold
1 steinkern, partial
2 steinkern and mold, part-counterpart
1 valve, whole, on matrix
1 steinkern, valve, on matrix
4 steinkern & mold & boings in Pycnodonte
1 valve, part-counterpart
4 steinkerns, pairs, with some shell
1 steinkern, pair, attached? to Pycnodonte
3 valves, whole, right, juveniles
1 valve, partial, left
6 valves, whole & partial, left & right
1 valve, whole, left
2 pair, incomplete, on Isognomon valve
.12 valves, whole & partial, left & right
2 left and right valves of a pair
2 valves, left & right, part-counterpart
3 valve, part-counterpart, & Acanthocardia
1 valve, on matrix, most shell present
2 valve, partial, part-counterpart
2 valve, steinkern, and partial valve
1 valve, partial, on matrix
1 steinkern, pair, poorly preserved
1 steinkern, pair, some shell remaining
2 steinkerns, valves, left and right
1 steinkern, valve, left
2 steinkerns, valve, left and right
Pelagornithidae
Mamma Ii a
Turritella uvasana Conrad, 1855
Hipponix sp.
Hipponix sp.
Calyptraea diegoana (Conrad, 1855)
cf. Neverita sp.
Fi cus mamillata Gabb, 1864
Fi cus mamillata Gabb, 1864
Voluta martini Dickerson, 1915
Conus horni i Gabb, 1864
Barbatia morsei Gabb, 1864
Glycyineris sp.
Lithophaga sp.
Isognomon clarki (Effinger, 1938)
Isognomon clarki (Effinger, 1938)
Isognomon clarki (Effinger, 1938)
Pycnodonte Stewarti Hanna, 1927
Pycnodonte Stewarti Hanna, 1927
Pycnodonte Stewarti Hanna, 1927
Pycnodonte Stewarti Hanna, 1927
Pycnodonte Stewarti Hanna, 1927
Pycnodonte Stewarti Hanna, 1927
Pycnodonte Stewarti Hanna, 1927
Pycnodonte Stewarti Hanna, 1927
Spondylus carlosensis Anderson, 1905
Spondylus carlosensis Anderson, 1905
Spondylus carlosensis Anderson, 1905
Spondylus carlosensis Anderson, 1905
Spondylus carlosensis Anderson, 1905
Crassatella uvasana Conrad, 1855
Venericardia hornii (Gabb, 1864)
Venericardia hornii (Gabb, 1864)
cf. Hiltha sp.
Claibornites diegoensis (Dickerson, 1916)
DATE 08/08/06
TIME 18:40:28
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5770
Carlsbad City Golf Course
PAGE 2
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109958
109959
109960
109961
109962
109963
109964
109965
109966
109967
109968
109969
109970
109971
109972
109973
109974
109975
1 valve, right, worn
4 steinkerns, valves, left and right
1 steinkern, valve, right
2 steinkern & mold, valve,part-counterpart
1 steinkern, valve, poorly preserved
1 steinkern, valve, right
2 steinkerns, valves, left and right
1 steinkern, valve, right
3 steinkerns, valves, left and right
1 steinkern, pair, poorly preserved
1 steinkern, valve
1 steinkern, valve, right
1 steinkern, pair
1 steinkern, valve
4 bivalves associated with Lithophaga
2 plant fragment, were with bird bone
1 mold of barnacle? on Pycnodonte valve
1 tooth, partial
Lucina taffana Dickerson, 1916
Acanthocardia (Schedocardia) breweri i (Gabb, 1864)
cf. Pitar sp.
Callista hornii (Gabb, 1864)
Callista hornii (Gabb, 1864)
Callista sp. cf. C. hornii (Gabb, 1864)
Callista sp. cf. C. horni i (Gabb, 1864)
Callista sp.
Hacrocallista sp.
cf. Callista sp.
cf. Callista sp.
Tellina sp. cf. T. soledadensis Hanna, 1927
Tellina sp. cf. T. townsendensis Clark, 1925
Gari sp. cf. G. texta Gabb, 1864
Pelecypoda
Tracheophyta
Thoracica?
Striatolamia sp.
DATE 08/08/06
TIME 18:45:40
LOCALITY # LOCALITY NAME
5771 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 135 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR09Dec05-1
LATITUDE 33° 7'33"N VARIANCE
LONGITUDE 117°18' 3"W
UTH 11 471937 3665094 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD 1927
MAP SOURCE USGS 1968(1975)
LOCALITY #- 5771
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, unit 4
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine shelf
DONATED BY
City of Carlsbad 9 Dec 2005
FIELD NOTES
BORbk:30 pgs.53,78,79,80
COLLECTOR
Brad 0. Riney 9 Dec 2005
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during pa Ieontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5771 was discovered approximately 100' west of station 8+00 of College
Boulevardapproximately 640' northwest of the intesection of Palomar Airport Road and College Avenue. See page 10 of the grading plans book.
Fossils were collected from a 8' thick, slightly yellowish brown, fining upward, bioturbated, arkosic medium-grained, medium- to fine-grained
sandstone.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 5' to 7' thick, light gray, gravelly, siltstpne rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270* feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Uni't 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were collected by hand quarrying.
Fossils recovered include poorly preserved steinkerns of marine pelecypods.
The locality has been covered with fill material.
LOCALITY 5771
DATE 08/08/06
TIME 18:41:04
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5771
Carlsbad City Golf Course
PAGE 1
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109976
109977
109978
2 steinkerns, valve, right, and pair
1 steinkern, valve, right
1 steinkern, valve, left
Hareia bunkeri (Hanna, 1927)
Tel Una sp.
Veneroida
DATE 08/08/06
TIME 18:45:53
LOCALITY # LOCALITY NAME
5772 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 85 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BORl3Jan06-1
LOCALITY #- 5772
LATITUDE 33° 7'56"N
LONGITUDE 117°17'53"W
VARIANCE
UTM 11 472195 3665803 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD 1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, unit 3
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine shelf
DONATED BY
City of Carlsbad 13 Jan 2006
FIELD NOTES
BORbk:30 pg.53
COLLECTOR
Brad 0. Riney 13 Jan 2006
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during paleontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5772 was discovered approximately 240' southeast of the eastern tip of
the center meridian cement island of Faraday Avenue. See page 27 of the grading plans book.
Fossils were collected from a greenish yellowish gray massive silty very fine-grained sandstone of Santiago C unit 3 ot Ts-C3.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 5' to 7' thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
(ftPegmatite Gravels") is the lowest and coarsest at around 50' fn thickness and consists of very coarse-grained, poorly sorted'sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 71 across. The uppermost 5' of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
The single specimen was collected by "pluck and run".
A single impression of Turritella was recovered.
The locality has been covered with vegetation and is no longer accessible.
LOCALITY 5772
DATE 08/08/06
TIME 18:40:46
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5772
Carlsbad City Golf Course
PAGE 1
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109979 1 mold, partial, very large specimen Turritella uvasana Conrad, 1855
DATE 08/08/06
TIME 18:46:07
LOCALITY # LOCALITY NAME
5773 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 134 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR15Dec05-1
LOCALITY #- 5773
LATITUDE 33° 7'33"N VARIANCE
LONGITUDE 117°17'55"W
UTM 11 472137 3665076 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD 1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member C, unit 3
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sltst
CITATION
DEPOSITIONAL ENVIRONMENT
marine shelf
DONATED BY
City of Carlsbad 15 Dec 2005
FIELD NOTES
BORbk:30 pg.78
COLLECTOR
Brad 0. Riney 15 Dec 2005
COMPILED BY
B.O. Riney 8 Mar 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 13 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during paleontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5773 was discovered approximately 400' east of station 8+00 of College
Avenue, approximately 800' northeast of the intersection of College Avenue and Palomar Airport Road. See page 10 of the grading plans book.
Fossils were collected from the lower part of teh Santiago C unit 3, Ts-C3, greenish gray silyt fine-grained well sorted sandstone approximately 60' in
thickness.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 5' to 7' thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of
approximately 270 feet of section divisible into'5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5t of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were collected using hand quarrying.
Fossils recovered include steinkerns of marine molluscs in no particular order.
The locality has been graded away.
LOCALITY 5773
DATE 08/08/06
TIME 18:40:53
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5773
Carlsbad City Golf Course
PAGE 1
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109980
109981
109982
1 steinkern, pair, partial
2 steinkern, valve, partial, and pair
2 steinkerns, valve, and pair
Marcia bunkeri (Hanna, 1927)
Pi tar sp.
cf. Area sp.
DATE 08/08/06
TIME 18:46:28
LOCALITY # LOCALITY NAME
5780 Carlsbad City Golf Course
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
BOR26Sep05-1
LOCALITY #- 5780
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY CarLsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 316 FT
LITHOLOGY DEPOSITIONAL ENVIRONMENT
sdst marine
CITATION
LATITUDE 33° 7'47"N VARIANCE
LONGITUDE 117017'24"W
UTM 11 472956 3665504 VARIANCE
MAP NAME San Luis Rey, Ca
MAP SCALE 1:24000 DATUM NAD1927
MAP SOURCE USGS 1968(1975)
STRATI GRAPH 1C POSITION
GROUP
FORMATION Lindavista Formation
MEMBER
INFORMAL NAME
ERA Cenozoic
SYSTEM Quaternary
SER/EPOCH Pleistocene
AGE/STAGE
NALMA
ZONE NAME
FIELD NOTES PHOTOS ACCESS NO.
BOR book 30
COLLECTOR
DONATED BY
City of Carlsbad 26 Sep 2005
B.O. Riney 26 Sep 2005
COMPILED BY
B.O. Riney 14 Mar 2006
ENTERED BY
M.K. Burgess 20 Mar 2006
LOCALITY DESCRIPTION
Fossils were discovered during paleontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. Locality 5780 was discovered approximately 1050' south of the intersection of
College Avenue and Palomar Point Street and station 38+00 of College Avenue. See page 18 of the grading plan book.
The fossil producing horizon is approximately 24" thick in a channel scoured into the underlying Ts-c. The pholad burrow was preserved in Ts-c, the
'rippled1 specimen was preserved in a yellowish orange, very micaceous, bedded sandstone slightly indurated and the shell impression was preserved in the
uppermost poorly sorted, coarse-grained, dark rusty yellow, semi friable sandstone.
The general stratigraphy exposed at Carlsbad City Golf Course is divisible into members B and C of the Santiago Formation. These two units are
separated by a marked disconformity. Member B consisted of about 35' of section including a 10' thick lower unit of light gray, fine-grained sandstone and
a 20' thick upper unit with a basal 51 to 7' thick, light gray, gravelly, siltstone rip-up clast filled, poorly sorted, very coarse-grained channel-filling
sandstone grading upwards into' a medium to dark yellowish greenish rusty gray sandstone containing localities 5762, 5763, and 5764. Member C consisted of '
approximately 270 feet of section divisible into 5 subunits, which were widespread and distinctive enough to have their own designations. Unit 1
("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and consists of very coarse-grained, poorly sorted sandstones and gravelly
conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured up to 7' across. The uppermost 5" of Unit 1 contained
locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to fine-grained sandstone containing the "Isognomon Bed" where
localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly grades into Unit 3, which is a greenish yellowish gray, silty,
massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish
Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758, 5767, and 5772 occur within Unit 3. A sharp erosional
contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous, marine sandstone containing locality 5771. Unit 4 is
generally normally graded and consists of 40' of section. Unit 5 is the stratigraphically highest unit and is characterized by rip-up clast lined channels
that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal part of Unit 5 is approximately 20' thick and consists of
a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet wide and 2 feet thick within a nearly white, medium grained,
crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained sandstone with an occasional siltstone rip-up clast lined channel.
A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain along a scoured surface by a 5 to 10' thick medium-grained
sandstone capped by a dark-brown mudstone 12 to 15' thick. Overlying the Santiago B and Santiago C seperated by angular unconformity is a flat lying
Pleistocene marine terrace deposited upon a wave cut platform. The thickness of the Pleistocene terrace deposits containing locality 5780 varied from 51 to
10' due to channeling into the underlyig Santiago formation. The general stratigraphy consisted of basal cobbles with 4' to 5' of light yellow micaceous
planar laminated fine- grained sandstone deposited mostly in the channels. Above the fine- grained sandstone the terrace deposit consisted of a rusty very
coarse grained poorly sorted cobbly sandstone approximately 51 in thickness.
Fossils were collected by quarrying and "pluck and run".
Recovered fossils include a single pholad burrow, a shell impression and an indeterminant "ripple" structure similar to a macrosystis "leaf".
LOCALITY 5780
DATE 08/08/06
TIME 18:41:09
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5780
Carlsbad City Golf Course
PAGE 1
PAL270
SPECIMEN NUMBER OF
NUMBER ITEMS DESCRIPTION SPECIES
109983
109984
2 impression of leaf? fragment in matrix
1 burrow, in matrix
Macrocysitis? sp.
Pholadidae
DATE 08/08/06
TIME 18:47:14
LOCALITY # LOCALITY NAME
5791 Carlsbad City Golf Course
LOCATION
COUNTRY USA
STATE CA
COUNTY San Diego
CITY Carlsbad
SECT TWNSP DIREC RANGE DIR
LOCATION IN SECTION
ELEVATION 279 FT
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
LOCALITY CARD
FIELD NUMBER
IDB14Sep05-1
LOCALITY #- 5791
LATITUDE 33° 7'36"N
LONGITUDE 117°17'28"W
VARIANCE
UTM 11 472853 3665359 VARIANCE
MAP NAME San Luis Rey, CA
MAP SCALE 1:24000 DATUM NAD1927
MAP SOURCE USGS 1968(1975)
STRATIGRAPHIC POSITION
GROUP
FORMATION Santiago Formation
MEMBER
INFORMAL NAME member B
ERA Cenozoic
SYSTEM Paleogene
SER/EPOCH middle Eocene
AGE/STAGE
NALMA
ZONE NAME
LITHOLOGY
sdst
CITATION
DEPOSITIONAL ENVIRONMENT
marine
DONATED BY
City of Carlsbad 14 Sep 2005
FIELD NOTES
IDB:Bk7, p78
COLLECTOR
Ian D. Browne 14 Sep 2005
COMPILED BY
I.D. Browne 5 Apr 2006
PHOTOS ACCESS NO.
ENTERED BY
M.K. Soetaert 24 Apr 2006
LOCALITY DESCRIPTION
Fossils were discovered during paleontological monitoring of grading activities for Carlsbad City Golf Course. The project site is located north of
Palomar Airport Road, west of El Camino Real, and east of Interstate 5. This locality is located on the Carlsbad City Golf Course project site
approximately 300 meters west of the western terminus of the Palomar Airport runway.
Fossils were recovered from a light orangish-gray, concretionary, fine- to medium-grained sandstone that was exposed at an approximate elevation of 279
feet.
Grading had just begun a few days prior to the discovery of this site and the exposure was poor. For that reason it was not possible to dvelop a good
understanding of the stratigraphic context of the fossiliferous stratum. The underlying unit was not observed at all. The overlying unit is a light gray
sandstone of unknown thickness. The general stratigraphy (as observed by Brad 0. Riney) exposed at Carlsbad City Golf Course is divisible into members B
and C of the Santiago Formation. These two units are separated by a marked disconformity. Member B consisted of about 35' of section including a 10'
thick lower unit of light gray, fine-grained sandstone and'a 20' thick upper unit with a basal 5' to 7' thick, light gray, gravelly, siltstone rip-up clast
filled, poorly sorted, very coarse-grained channel-filling sandstone grading upwards into a medium to dark yellowish greenish rusty gray sandstone
containing localities 5762, 5763, and 5764. Member C consisted of approximately 270 feet of section divisible into 5 subunits, which were widespread and
distinctive enough to have their own designations. Unit 1 ("Pegmatite Gravels") is the lowest and coarsest at around 50' in thickness and consists of very
coarse-grained, poorly sorted sandstones and gravelly conglomerates. Clasts are derived from pegmatites and granitics to the east and have been measured
up to 7' across. The uppermost 5' of Unit 1 contained locality 5765. Unit 1 rapidly grades into Unit 2, which is a 20' thick, yellow, medium- to
fine-grained sandstone containing the "Isognomon Bed" where localities 5766, 5768, 5769, 5770, and 5759 occur within the uppermost 5'. Unit 2 rapidly
grades into Unit 3, which is a greenish yellowish gray, silty, massive, very fine-grained sandstone approximately 60' thick. Thirty feet from the base of
Unit 3 is a 12" thick dark greenish gray mudstone ("Greenish Mudstone Marker Bed" or "GMMB"). Unit 3 continues upwards for another 30'. Localities 5758,
5767, and 5772 occur within Unit 3. A sharp erosional contact separates Unit 3 from Unit 4, which is a very light gray, mostly fine-grained, micaceous,
marine sandstone containing locality 5771. Unit 4 is generally normally graded and consists of 401 of section. Unit 5 is the stratigraphically highest
unit and is characterized by rip-up clast lined channels that grade into massive, reddish brown siltstones and mudstones containing root casts. The basal
part of Unit 5 is approximately 20' thick and consists of a series of rip-up clast lined channels ranging from 5 feet wide and one foot thick to 10 feet
wide and 2 feet thick within a nearly white, medium grained, crossbedded arkosic sandstone. Above this occurs a 30' thick whitish gray, fine-grained
sandstone with an occasional siltstone rip-up clast lined channel. A reddish brown siltstone 10' thick occurs at the top of this sandstone and is overlain
along a scoured surface by a 5 to 10' thick medium-grained sandstone capped by a dark-brown mudstone 12 to 15' thick.
Fossils were hand quarried out of the cut slope.
Recovered fossils include well preserved internal and external molds of invertebrates and oyster shells.
The locality was graded away.
LOCALITY 5791
DATE 08/08/06
TIME 18:39:20
SAN DIEGO NATURAL HISTORY MUSEUM
DEPARTMENT OF PALEONTOLOGY
FAUNAL LIST FOR LOCALITY 5791
Carlsbad City Golf Course
PAGE 1
PAL270
SPECIMEN NUMBER Of
NUMBER ITEMS DESCRIPTION SPECIES
109985
109986
109987
109988
109989
109990
109991
109992
109993
109994
109995
109996
109997
109998
2 stienkerns, partial
10 steinkerns
1 steinkern, partial
1 steinkern
1 steinkern, partial
1 steinkern, valve, left, poorly preserved
2 steinkerns, valves, left and right
1 steinkern, valve, left, very worn
25 valves, right & left on matrix, juvenile
1 steinkern, valve
14 steinkerns, valves, left and right
2 steinkern & mold, valve, partial
1 steinkern, valve, part, poorly preserved
6 steinkerns, valves, left & right, & pair
Potamides carbonicola Cooper, 1894
Calyptraea diegoana (Conrad, 1855)
cf. Tejonia sp.
Nerita triangulata Gabb, 1869
Gastropoda
cf. Nuculana sp.
Barbatia morsei Gabb, 1864
cf. Ostrea idriaensis Gabb, 1869
cf. Pycnodonte Stewarti Hanna, 1927
cf. Diplodonta sp.
Pelecyora aequi Lateral is (Gabb, 1869)
Pelecyora aequilateral is (Gabb, 1869)
Solena (Eosolen) novacularis (Anderson & Hanna, 1928)
Corbula sp. cf. C. pan' I is Gabb, 1864