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HomeMy WebLinkAbout3593; Faraday Avenue Road Extension; Final Paleontological Report Faraday Ave Extension; 1999-11-08FINAL PALEONTOLOGICAL REPORT FARADAY AVENUE EXTENSION CITY OF CARLSBAD SAN DIEGO COUNTY, CALIFORNIA Preparedfor: DEPARTIVIENT OF PUBLIC WORKS t CITY OF CARLSBAD 2075 La Palmas Drive Carlsbad, CaUfomia 92009-1576 Prepared by: DEPARTMENT OF PALEONTOLOGICAL SERVICES San Diego Natural History Museum P.O. Box 121390 San Diego, CA 92112 Thomas A. Dem^r^, Ph.D. Director Prepared under contract to: RECON 4241 Jutland Drive, Suite 201 San Diego, CA 92117-3653 8 November 1999 FINAL PALEONTOLOGICAL IVHTIGATION REPORT FARADAY AVENUE EXTENSION « CITY OF CARLSBAD SAN DIEGO COUNTY, CALIFORNIA INTRODUCTION < This report presents tiie results of the paleontological resource mitigation program conducted during tiie excavation portion of constmction activities for tiie Faraday Avenue Extension project. City of Carlsbad, San Diego County, Califomia (Figure 1). This mitigation program mcluded constmction monitoring, fossil salvage, laboratory preparation of salvaged specimens, curation of prepared specunens, and storage of • cumted specunens. The mitigation program was a requirement of the gradmg permit issued by the City of San Diego. Work was performed for the City of Carlsbad, Public Works Department under a contract with RECON of San Diego, Califomia. The project site is located along the north side of Macario Canyon on the eastem shore of « Aqua Hedionda Lagoon (Figure 2). The new right-of-way extends fi*om tiie cunent eastem terminus of Cannon Road to the cunent westem terminus of Faraday Avenue, west of College Boulevard. Constmction improvements included mass excavation employing scrapers and bulldozers. Excavation operations were conducted by W.R. Connelly, Inc. Personnel Museum personnel who participated in the field monitoring portion ofthe paleontological mitigation program included Robert Q. Gutzler, John L. Pfanner, and Bradford O. Riney. Museum personnel who participated in the laboratory portion of the paleontological mitigation program included Thomas A. Demere, Robert Q. Gutzler, and N. Scott Rugh. The final report was prepared by Thomas A Demere and Hugh M. Wagner. •% METHODS Field Methods Field activities included monitoring of excavation operations, examination of temporary If and permanent cut slopes, collection of unearthed fossil remains, and recovery of geologic, stratigraphic, and paleontologic contextual data. Specific field methods are discussed more fully below. Monitoring Monitoring of mass grading operations proceeded on an intermittent basis 9 from Jime 1999 through August 1999 and involved physically following the grading equipment and inspecting fi-eshly exposed bedrock for imearthed fossil remains. Ideally, OBAHOE COUtfTY RIVERSIDE COUrfFY ^^-—..^ ori / , jlHi } la — / ^ PROJECT § SITE NO SCALE ^.^^ Pacific Beacfi San Diego Mission Beach Ocean Beach PoMLoma Tijuana MEXICO Figure 1. Location and vicinity (inset) maps for the Faraday Avenue project site. BEST COPY ooo FEET Printed from TOPO! ©1998 Wildflower Productions (ww.topo.coKO Figure 2. Index map for the Faraday Avenue Extension project showing location of the right-of-way (ROW) and paleontological collecting sites (e.g., SDSNH locality 4345). Base map: San Luis Rey, CA 1:24000 USGS topographic quadrangle. inspection would have involved examination of every newly exposed surface, but tiiis was operationally impossible. The pace and quantity of equipment in the cut detennined how often monitors could make inspections. When tiie active excavations were too dangerous to enter because of a nanow cut, short haul, and/or heavy traffic, an elevated vantage point provided a secure point fi-om which to observe tiie progress of grading. Safety procedures followed by field personnel included die wearing of appropriate clotiiing (high-visibility vests, hard hats, and large hand-held flags), securing equipment operator's acknowledgment before entering an active cut, notifying grading personnel before beginning a salvage, marking fossil discovery sites witii surveyor's flagging, and using caution when driving on haul roads. Attendance at periodic safety meetings allowed the paleontological monitors to discuss mutual safety issues witii excavation personnel. Fossil salvage Fossil salvage procedures mcluded "pluck-and-run" and hand quarrying. The particular salvage procedure employed depended on a number of factors including: tiie importance ofthe unearthed specimen, the size of the specimen, whetiier the specimen was a single isolated element or part of a dense fossil assemblage, how critical an area the discovery site was to the progress of the constmction schedule, what type of equipment was being used, and the opinion ofthe constmction foreman. "Pluck-and run" This technique was used when equipment traffic in the cut was heavy and immediate action was required to remove an isolated specimen from the active cut so as not to slow down the progress of the grading operations. "Pluck-and-run" salvage involved exploratory probing around an imearthed fossil specimen to determine its dimensions, application of hardeners (usually a cyanoacrylate glue) to stabilize any damaged or weakened areas on the fossil, and then removal of the specimen from the active cut. This last step generally involved excavating around the fossil and plucking it fi-om the ground in its enclosing block of matrix. The fossil was then labeled with appropriate field numbers, wrapped in tissue or newspaper, and transported to the museum. Hand Quarrying Quarry-style salvage included specific "mining" of fossiliferous sedimentary rock layers. When a particularly rich horizon was encountered the overlying levels were removed down to that horizon, which was then systematically quarried to remove large intact matrix blocks. These blocks were then trimmed down to reduce bulk, labeled with field collecting data, and transported back to the Museum. Geologic Mapping Geologic mapping was conducted throughout the course of the grading operations. Mapping was done through examination of outcrops exposed in active cuts and finished slopes. The goal of mappmg was to delimit the nature of sedimentary rock units on the project site, their aerial distribution, lithologic character, upper and lower contacts and the location of stmctural deformation (faults and folds). Data collected mcluded lithologic descriptions (color, sorting, texture, stmctures, and grain size), stratigraphic relationships (bedding type, thickness, and contacts), and topographic position. Measurement of stratigraphic sections was done witii a hand level and six foot folding engineers mle. Laboratory Methods Laboratory activities included mechanical preparation and curation of fossil specimens. This work occuned during September and October, 1999. Specimen preparation Fossil specimens were prepared using standard mechanical fossil preparation techniques. This work mvolved tiie use of hanuners and chisels to separate individual fossil shell molds and casts fi-om siltstone matrix blocks. Broken specimens were repaired using eitiier standard white wood glues or special adhesives (e.g., cyanoacrylate). The fossils were tiien sorted by species type and skeletal element. FossU curation Fossil curation involved identification of individual fossil specimens, assignment of unique specimen catalog numbers, entry of specimen catalog information into tiie specimen computer database, printing the specimen label, writing the catalog number on the specunen using permanent India ink on a patch of white acrylic paint, placement of tiie specimen with its label into appropriate-sized paper specimen trays, and storage of the U^iyed specimen in tiie steel "Lane-style" geological cabinets in the research collection area of the museum. RESULTS Stratigraphy Grading operations for the extension of Faraday Avenue exposed metavolcanic basement rocks ofthe late Mesozoic-age Santiago Peak Volcanics and marine sedimentary rocks of the Eocene-age Santiago Formation (Figure 3). Late Jurassic to earlv Cretaceous metavolcanic rocks (Santiago Peak Volcanics) Dark colored, very resistant metavolcanic rocks mapped as the Santiago Peak Volcanics were observed in the eastem portion of the project right-of-way, between about engineering station (ES) 58 and 60 (Figure 4). Slightiy-to-moderately metamorphosed volcanic rocks occur in a discontinuous belt along the westem edge of the Peninsular Ranges Province, from the Santa Ana Mountains of Orange and Riverside counties, to well south of the Intemational Border in Baja Califomia, Mexico (Larsen, 1948). In San Diego County, these rocks are refened to the Santiago Peak Volcanics, the type locality of which is in the Santa Ana Mountains. The Santiago Peak Volcanics are composed mainly of volcanic breccias, with a lesser amount of volcanic tuffs and flows. In some areas, slightiy-to-moderately metamorphosed marine mudstones and sandstones appear to be interbedded with the volcanic rocks (Fife et al., 1967). Uranium-lead radiometric dates on the volcanic flow-rocks of the Santiago Peak Volcanics have yielded earliest Cretaceous ages, approximately 120-130 mUlion LEGEND 120' 100' - 80'- 60'- 40' - 20' - CD B_ A' .4346 .4345 -4347 projected Topsoil Sandstone Sandy Siltstone Siltstone Claystone Cemented Siltstone Concretions Shell Bed Figure 3. Composite stratigraphic section for the Faraday Avenue project site. Section, measured between engineering stations 27+00 and 35+00, shows the locations of paleontological collecting sites (e.g., SDNHM Locality 4345). 130'-i 35+00 35+00 40+00 45+00 • 50+00 55+00 60+00 Figure 4. Generalized geologic cross-section for the Faraday Avenue project site. Section shows locations of paleontological coUecting sites (e.g., SDNHM Locality 4345) and measured stratigraphic sections A-A', B-B', C-C. • years ago (Ma) (Herzig and Kimbrough, 1991). The Santiago Peak Volcanics were altered during magmatic fonnation of tiie vast volumes of early Cretaceous plutonic rocks. Kncene marine deposits (Santiago Formation) Sedimentary rocks mapped as tiie Santiago Fonnation were exposed over tiie majority of tiie project right-of-way between ES 10 and 57. This rock unit was approximately 100 feet tiiick and consisted of gray- green laminated to massive siltstones and light gray to white fine-grained massive sandstones (Figure 3). Locally continuous concretionary sihstone horizons in the lower 30 feet of section contained fossils of Eocene marine invertebrates. The entire stratigraphic sequence is deformed and tilted approximately 10-15° to tiie nortiiwest. A series of high-angle normal faults striking N20-25°W cuts tiurough tiie right-of-way between ES 26 and 46 (Figure 4). The Santiago Formation was originally named for a sequence of Eocene strata exposed on the westem flanks of the Santa Ana Mountains in Orange County (Woodring and Popenoe, 1945) The name subsequentiy has been used to refer to rocks of Eocene age in northwestem San Diego County (Wilson, 1972). Wilson recognized three members of the Santiago Formation in the Encinitas-Carlsbad-Oceanside area, referring to them as members "A", "B", and "C." Member "C" consists predominantly of fine- to very coarse-grained, white to gray-white, fnable, cross-bedded, arkosic sandstone with interbeds of green to green-brown siltstones, silty mudstones, and claystones" (Wilson 1972). The maximum exposed thickness of Member "C" is approximately 100 feet, as seen at Rancho Del Oro, in Oceanside. Member "C" crops out from south of Batiquitos Lagoon nortii to at least the San Luis Rey River Valley. Member "B" consists largely of green and gray, very fine- to medium-grained, arkosic sandstone, with common calcite-cemented concretions and frequent interbeds of multicolored clayey sandstone and claystone (Wilson 1972). South of Batiquitos Lagoon this middle member of the Santiago Formation reaches an exposed thickness of about 165 feet. Member "B" crops out from Encmitas in the south, to at least the San Luis Rey River Valley in the north. Member "B" gradationally overlies the Toney Sandstone near Encinitas, and is unconformably overlain by Member "C" wherever the contact between the two is observed. Member "A" generally consists of green, unfossiliferous, massive mudstones (Wilson 1972). This lower member of the Santiago Formation has an apparent exposed thickness of 22 to 100 feet. Member "A" crops out sparingly south of SR-78, in the Ceno de la Calavera area (Wilson 1972), and is also present on the south side of the San Luis Rey River Valley near Guajome Lake. Member "A" is gradationally overlain by deposits of Member "B" in the area around Ceno de la Calavera in eastem Carlsbad. Paleontological Collecting Localities Three paleontological collecting sites were discovered during tiie monitoring and salvage phases of tiie mitigation program. Fonnal descriptions of tiiese localities are included in tiie Appendix along witii faunal Usts of die catalogued fossil specimens recovered from each locality. The geographic and stratigraphic positions of tiie localities are illustrated in figures 2 and 3, respectively. SDSNH locaUty 4345 This locality was discovered at an elevation of 57 feet during grading of tiie Santiago Formation in tiie vicinity of ES 35+25. Fossils were recovered from a gray-green, laminated to massive, slightly indurated, sandy siltstone and consist of weathered siltstone molds and casts of marine molluscs, shell-lined bunows of annelid wonns, seed pods of flowering plants, and tootii plates ofa myliobatoid sting ray. SDSNH locality 4346 This locality was discovered at an elevation of 56 feet during grading ofthe Santiago Formation in tiie vicinity of ES 35+25. This locality lies directly beneatii tiie siltstone bed tiiat produced SDSNH locality 4345 and is probably conelative with SDSNH locality 4347. Fossils were recovered from a partially concretionary, gray- green sandy siltstone and consist of indurated sihstone molds and casts of marine molluscs. SDSNH locality 4347 This locality was discovered at an elevation of 101 feet during grading of the Santiago Formation in the vicmity of ES 40+50. This locality correlates with SDSNH locality 4346. Fossils were recovered from a gray-green, partially concretionary, sandy siltstone and consist of indurated siltstone molds and casts of marine molluscs and shell-lmed bunows of annelid worms. Paleontology Tracheophvta (vascular plants) Very sparse remains of fossil plants were recovered from SDSNH locality 4345. These fossUs consist of seed pods of a tropical tree related to the living genus, Terminalia. Trace fossils flchnofossils) Ichnofossils are behavioral traces of fossil organisms and include tracks, trails, bunows, and fecal masses. Distinctive shell-lined bunows representing a marine bunowing organism {Diopatrichnus roederensis) were recovered from SDSNH localities 4345 and 4347. Kem (1978) suggests that D. roederensis was made by a marine annelid worm. Mollusca (clams and snails) Remams of fossil molluscs including gastropods (snails), pelecypods (clams), and scaphopods) tusk shells) were collected from all three localities. Gastropod species identified from these localities include Turritella uvasana, Architectonica sp., Trichotropis lajollaensis, Calyptraea diegoana, Ectinochilus macilentus, Tejonia moragi, Sinum sp, Ficopsis cooperiana, Ancilla sp., Conus sp., and Surculites mathewsonii Pelecypod species identified from these localities include Acila sp.. Nuculana sp., Glycymeris sp, Cardium sorrentoensis, Venericardia sp., Acanthocardia brewerii. Crassatella uvasana, Pelecyora sp. Callista sp., Tellina cf T. soledadensis, Tellina sp., Solena novacularis, Gari sp., Corbula sp.. Teredo sp., and Dentalium sp. Chordata (sharks, fish, reptiles, birds, and mammals) The only vertebrate fossil recovered from tiie project was collected from SDSNH locality 4345 and includes a single tootii plate ofa myliobatoid sting ray related to the living genus Myliobatus sp. DISCUSSION Introduction The following section is limited to a general discussion of the results of the paleontological mitigation program conducted for the Faraday Avenue Extension project. 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 permanentiy house the salvaged fossil remains. The fossils recovered from the Faraday Avenue Extension project are now in a condition for scholarly research. The important distinction is that tiie discovery, recovery, and conservation of the fossils are separate endeavors from their study. Geology The project area lies in a geologically complex region of the San Diego coastal plain where resistant metavolcanic and metasedimentary rocks of the Santiago Peak Volcaiucs are overlain by sandstones and sihstones of the Santiago Formation. The contact between the Santiago Peak Volcanics and the Santiago Formation is an inegular surface, which represents an ancient topography or landscape eroded during the Paleocene and early Eocene approximately 60 to 50 Ma. This ancient landscape was later buried during the Eocene by sediments carried by westward flowing streams and deposited in a variety of paleoenvironments including river channels, lagoons, estuaries, and nearshore marine sea floors. These sedimentary deposits accumulated in the Carlsbad area during the middle portion of the Eocene Epoch between 46 and 43 Ma. Today these ancient sediments are represented by the distinct layers of mudstone, sandstone and conglomerate that occur throughout the dissected canyon and mesa lands of eastem Carlsbad, Oceanside, and Vista. Paleontology Previous Work Member "C" of the Santiago Formation has produced abimdant vertebrate fossils from several districts including Carlsbad, Oceanside, and Camp Pendleton Marine Corps Base (Golz 1976; Golz and Lillegraven 1977; Walsh 1991; Rasmussen, et al., 1995). Fossils collected from this upper member include weU- 10 preserved remains of turtles, snakes, lizards, crocodiles, birds, and mammals (e.g., opossums, msectivores, primates, rodents, brontotiieres, tapirs, protoreodonts, and otiier early artiodactyls). The mammal assemblages are especially significant because of tiieir great faunal diversity and excellent specimen preservation. These fossils, togetiier with contemporaneous mammal fossils from the Poway Group near San Diego, make tiie Eocene deposits of San Diego County among the most significant in Nortii America. Also recovered from Member "C" deposits are remains of various types of marine organisms including calcareous nannoplankton (Bukry 1991) and molluscs (Demere and Boettcher 1985; WUson 1972). Member "B" has produced well-preserved vertebrate fossils from several localities in Carlsbad and Oceanside (Walsh 1991). Fossils collected from tiiis member include remains of opossums, insectivores, primates, rodents, brontothere, rhinoceros, and uintathere. Also recovered from Member "B" deposits are remains of various types of marine and estuarine molluscs (Wilson 1972). Member "A" has yet to produce any fossils, but the discovery of any diagnostic fossils in this rock unit would be of great importance in resolving the age and stratigraphic sigiuficance of the Santiago Formation. Paleoenvironment Paleoenvu-onmental components of the moUuscan assemblages recovered from the Faraday Avenue Extension right-of-way are similar to those previously known from the Santiago Formation and suggest deposition in a shallow marine, continental shelf setting below storm wave base. Many of the moUuscan taxa represent species that lived partially or entirely buried in sea floor sediments. These infaunal species include Turritella., Ficopsis sp., Corbula sp., Tellina sp., Acila sp., Glycymeris sp., Acanthocardia, Venericardia, Callista, Marcia, and Dentalium. Epifaunal predaceous snails are represented by Conus and Tejonia. Calyptraea and Ostrea represent epifaunal moUuscan species that probably lived in shallower, inshore habitats. The mixing of these two groups of molluscs can be explained by post-mortem offshore transport of shell material from shallow water into slightiy deeper water. This sort of post-mortem transport of moUuscan shell material is common to continental shelf deposits. Paleoclimate The marine invertebrate fossil assemblage recovered from the Santiago Formation contains a number of taxa that have modem representatives livmg at subtropical to tropical latitudes today. This tropical element is also seen in paleofloras recovered from time conelative sedimentary rocks in metropolitan San Diego (Walsh, 1996). The plant fossils suggest that mean annual air temperatures for this area during the Eocene were around 68° F (20° C) and that precipitation approached 60 inches (152 cm) per year, with most rainfall falling in the summer months (Frederiksen, 1991; Myers, 1991). 11 Geologic Age The absolute age of tiie Santiago Fonnation sihstones and fme-grained sandstones exposed at die Faraday Avenue Extension project is not precisely known. Fossil molluscs recovered from tiiis project are comparable to moUuscan assemblages collected from tiie Santiago Formation (SDSNH locality 3478) as exposed at Aviara in soutiiem Carlsbad. SDSNH locality 3478 yielded calcareous nannofossils indicative of middle Eocene coccolith Subzone CP14a, which has been dated in tiie deep sea at 42-43 Ma (Bukry, 1991). CONCLUSIONS The paleontological resource mitigation program conducted during constmction activities at the Faraday Avenue Extension project was successful in terms of the discovery and recovery of Eocene-age fossil remains. The documentation of three fossil collecting localities and the recovery of a variety of species of Eocene fossil molluscs represents a resource for future research projects including studies of systematics, paleoenvironments, and biostratigraphy. REFERENCES Bukry, D. 1991. Transoceanic correlation of Middle Eocene coccolith Subzone CP 14a at Batiquitos Lagoon, San Diego County. In, P.L. Abbott and J.A. May (eds.). Eocene Geologic History, San Diego Region. Society of Economic Paleontologists and Mineralogists, Pacific Section 68:189-194. Demere, T.A., and R.S. Boettcher. 1985. Paleontology and biostratigraphy of middle Eocene nearshore marine sedimentary rocks, Leucadia, San Diego County, Califomia. In, P.L. Abbott (ed.). On the Manner of Deposition of the Eocene Strata in Northem San Diego County. San Diego Association of Geologists, fieldtrip guidebook, pp. 49-53. Fife, D.L., J.A. Minch, and P.J. Crampton. 1967. Late Jurassic age of the Santiago Peak Volcanics, Califomia. Geological Society of America, Bulletin 78:299-303. Frederiksen, N.O. 1991. Age determinations for Eocene formations of the San Diego, California, area, based on pollen data. In, P.L. Abbott and J.A. May (eds.). Eocene Geologic History, San Diego Region. Society of Economic Paleontologists and Mineralogists, Pacific Section 68:195-199. Golz, D.J., 1976. Eocene Artiodactyla of southem Califomia. Natural History Museum of Los Angeles County, Science Bulletin 26: 1-85. 12 Golz, D. J, and J. A. LiUegraven, 1977. Summary of known occurrences of tenestrial vertebrates from Eocene strata of southem Califomia. University of Wyoming, Contributions to Geology 15: 43-65. Herzig, C.T., and D.J. Kimbrough. 1991. Early Cretaceous zircon ages prove a non- accretionary origin for the Santiago Peak Volcanics, northem Santa Ana Mountains, Califomia. Geological Scociety of America, Cordilleran Section, Abstracts with Programs 23:35. Kem, J.P. 1978. Paleoenvironment of new trace fossils from the Eocene Mission Valley Formation, Califomia. Joumal of Paleontology 52:186-194. Larsen, E.S., Jr. 1948. Batholith and associated rocks of Corona, Elsinore, and San Luis Rey quadrangles, southem Califomia. Geological Society of America, Memoir 29:1-182. Myers, J.A. 1991. The early Eocene Toney Flora, Delmar, Califomia. In, P.L. Abbott and J.A. May (eds.). Eocene Geologic History San Diego Region. Society of Economic Mineralogists and Paleontologists, Pacific Section 68:201-215. Rasmussen, D. T., M. Shekeile, S. L. Walsh, and B. O. Riney, 1995. The dentition of Dyseolemur, and comments on the use of the anterior teeth in primate systematics. Joumal Human Evolution 29: 301-320. Walsh, S. L., 1991. Eocene mammal faunas of San Diego County. In, P. L. Abbot and J. A. May (eds.), Eocene Geologic History San Diego Region, Society of Economic Mineralogists and Paleontologists, Pacific Section 68: 131-148. Walsh, S. L. 1996. Middle Eocene mammal fauns of San Diego County, Califomia. In, D. R. Prothero and R. J. Emery (eds.). The Tenestrial Eocene-Oligocene Transition in Nortii America. Cambridge University Press, Cambridge, England, pp. 75-119. Wilson, K. L., 1972. Eocene and related geology ofa portion of the San Luis Rey and Encinitas quadrangles, San Diego Coimty, Califomia. Unpublished M.A. thesis. University of Califomia, Riverside, 1-135. Woodring, W. P., and W. P. Popenoe, 1945. U.S. Geological Survey, Oil and Gas Investigation Preliminary Chart 12. 13 APPENDIX 14 DATE 11/08/99 TIHE 13:38:18 SAN DIEGO NATURAL HISTORY HUSEUH DEPARTHENT OF PALEONTOLOGY LOCALITY CARD LOCALITY 0 LOCALITY NAHE 4345 Faraday Avenue Extension FIELD NUMBER JLP8July99 LOCATION COUNTRY U.S.A. STATE CA COUNTY San Diego CITY Carlsbad LATITUDE 33° 8' 1"N VARIANCE LONGITUDE 117-18' 4"U UTM 11 471910 3665955 VARIANCE STRATIGRAPHIC POSITION GROUP FORHATION Santiago Formation HEMBER INFORMAL NAME member C SECT TUNSP DIREC RANGE DIR LOCATION IN SECTION unsurveyed ELEVATION 57 FT HAP NAME San Luis Rey, CA HAP SCALE 1:24000 HAP SOURCE USGS 1968(1975) ERA Cenozoic SYSTEM Paleogene SER/EPOCH middle Eocene AGE/STAGE NALHA ZONE NAHE LITHOLOGY DEPOSITIONAL ENVIRONHENT slst marine CITATION FIELD NOTES PHOTOS ACCESS NO. Y COLLECTOR J.L. Pfanner 8 Jul 1999 COMPILED BY J.L. Pfarmer 6 Oct 1999 ENTERED BY N.S. Rugh 7 Oct 1999 LOCALITY DESCRIPTION This locality was discovered during grading for the western extension of Faraday Avenue in Cartsbad. The roadway extends Faraday Avenue from its current terminus near Halley Drive at the head of Hacario Canyon, uest to its intersection with the new Cannon Road extension just east of the Hacario Canyon bridge. Grading occured along the north side of Macario Canyon on the south side of Evan's Point. Locality 4345 was discovered in the roadcut exposure (north side) at engineering station 35 + 25'. This statics is 2525 feet southeast of the intersection of Faraday Avenue and Cannon Road. Fossils were collected from a laterally continuous gray-green, laminated to massive, slightly indurated sandy siltstone bed. The fossil-producing horizon was part of a dipping (N15 degees E, 10 degrees NU) Eocene stratigraphic sequence at least 100 feet thick. A composite section was measured between ervgineering stations 27 + 00 and 36 + 00 and extended from elevation 40 feet in a deep canyon clean out to a topographic high of 140 feet on a hilltop. The section begins with a gray-green laminated siltstone unit with two distinct concretionary horizons and a thin orange, friable sandstone marker bed. Localities 4345 - 4347 were all coUected from the stratigraphic interval between the concretionary horizons. Approximately 67 feet above the base of the exposed section is a sharp contact with a 40 foot thick unit of white, fine-grained friable sanstone. This sandstone is in turn overlain by another sequence of gray-green, laminated, slightly indurated siltstone. Fossils were collected by hand-quarrying fossiliferous matrix blocks from the active construction excavation. These blocks were later reduced in bulk. Fossils collected from this locality include weathered molds and casts of marine molluscs. This locality has been capped with fill material and landscaped. Compiled by: J.L. Pfanner and T.A. Demere Donor: City of Carlsbad Locality: 4345 DATE 11/08/99 TIME 15:23:05 SAN DIEGO NATURAL HISTORY HUSEUH DEPARTHENT OF PALEONTOLOGY FAUNAL LIST FOR LOCALITY 4345 Faraday Avenue Extension PAGE 1 PAL285 SPECIMEN HUHBER OF NUHBER ITEMS DESCRIPTION SPECIHEN NAHE 74347 1 leaf blade, with pelecypod & gastropod Ang i ospermophyta 74349 1 seed pod Terminalia sp. 74348 5 burrows, densely packed with mollusk Diooatrichnus roederensis Kern. 1978 74326 1 steinkern (with nuclear whorls?) Gastropoda 74325 2 stienkern and mold Gastropoda 74313 5 steinkerns, on matrix Architectonica sp. 74314 1 steinkern, in matrix TrichotroDis (?) laiollaensis Hanna. 1927 74315 1 steinkern CalvDtraea diegoana (Conrad. 1855) 74319 10 steinkerns, whole & partial, and molds FicoDsis coooeriana Stewart. 1927 74318 5 steinkerns, juveniles Naticidae 74317 2 steinkerns, one on matrix Sinum sp. 74316 8 steinkerns and molds, partial Ectinochilus (Macilentos) macilentus (White. 1889) 74312 3 steinkerns, partial, in matrix Turritella uvasana aoolinae Hanna. 1927 74323 1 steinkern, in matrix Neogastropoda 74322 1 steinkern Conus SD. 74321 2 steinkern, and mold, partial Muricidae? 74320 1 mold Ancilla so. 74324 1 steinkern, whole Opisthobranchia 74345 1 mold, valve, partial Pelecypoda 74329 3 steinkerns, valves, partial Glvcvmeris sp. 74344 10 steinkerns, valves, left and right Corbula sp. 74330 4 molds, valves, left & right, & pair Brachidontes so. 74328 2 steinkern, valve, left, and pair Nuculana SD. 74327 1 mold, valve, right Acila SD. 74332 2 steinkern, valve, and molds Acanthocardia (Schedocardia) brewerii (Gabb. 1664) 74331 4 steinkerns, valves, left & right Venericardia sD. 74343 2 steinkerns, valves Gari sp. 74342 1 steinkern, pair, in matrix Solena (Eosolen) novacularis (Anderson & Hanna, 1928) 74339 1 steinkern, valve, fragment Tellina SD. cf. T. soledadensis Hanna. 1927 74340 1 steinkern, valve, right Tellina SD. 74341 6 steinkerns, valves, left ft right Tellina SD. 74337 8 molds & casts, valves, left & right Veneridae 74338 5 molds, valves, partial, and pair Veneridae 74335 2 mold and cast, valve, partial Callista sp. 74336 B steinkerns, valves, left & right, & pair cf. Callista SD. * DATE 11/08/99 TIHE 15:23:07 SAN DIEGO NATURAL HISTCffiY MUSEUM DEPARTHENT OF PALEONTOLOGY FAUNAL LIST FOR LOCALITY 4345 Faraday Avenue Extension PAGE 2 PAL285 SPECIHEN NUHBER OF HUHBER ITEMS DESCRIPTION SPECIHEN NAHE 74333 2 molds, valves, partial 74334 7 steinkerns, valves, left and right 74346 8 steinkerns, and molds, partial 74350 1 tooth plate, partial Pelecyora sp. cf. Pelecyora sp. Dental inn stentor Anderson & Hanna, 1925 cf. Hyliobatis sp. DATE 11/08/99 TIHE 15:22:39 SAN DIEGO NATURAL HISTORY HUSEUH DEPARTHENT OF PALEONTOLOGY FAUNAL LIST FOR LOCALITY 4345 Faraday Avenue Extension PAGE 1 PAL240 SPECIMEN NUMBER OF NUHBER ITEHS PHYLUM CLASS ORDER FAHILY SPECIES 74312 3 Hoilusca Gastropoda Hesogastropoda Turritellidae Turritella uvasana aoolinae Harma. 1927 74313 5 MoIlusca Gastropoda Hesogastropoda Architectonicidae Architectonica SD. 74314 1 Mollusca Gastropoda Hesogastropoda Cerithi idae Trichotrwis (?) laiollaensis Kanna. 1927 74315 1 Mollusca Gastropoda Hesogastropoda Crepidulidae CalvDtraea diegoana (Conrad. 1855) 74316 8 Mollusca Gastropoda Hesogastropoda Stronfcidae Ectinochilus (Macilentos) macilentus (Uhite. 1889) 74317 2 Hoilusca Gastropoda Hesogastropoda Naticidae Sinum sp. 74318 5 Hoilusca Gastropoda Hesogastropoda Naticidae 74319 10 Mollusca Gastropoda Hesogastropoda Ficidae FicoDsis coooeriana Stewart. 1927 74320 1 Hoilusca Gastropoda Neogastropoda Olividae Ancilla sp. 74321 2 Hoilusca Gastropoda Neogastropoda Huricidae? 74322 1 Nollusca Gastropoda Neogastropoda Conidae Conus SD. 74323 1 Hoilusca Gastropoda Neogastropoda 74324 1 Hoilusca Gastropoda Opisthobranchia 74325 2 Hoilusca Gastropoda 74326 1 Hoilusca Gastropoda 74327 1 Hoilusca Pelecypoda Nuculoida Nuculidae Acila SD. 74328 2 Nollusca Pelecypoda Nuculoida Nuculanidae Nuculana SD. 74329 3 Kollusca Pelecypoda Areoida Glycymerididae Glvcvmeris SD. 74330 4 Hoilusca Pelecypoda Mytiloida Hytilidae Brachidontes sp. 74331 4 Hoilusca Pelecypoda Veneroida Carditidae Venericardia SD. 74332 2 Hoilusca Pelecypoda Veneroida Cardi idae Acanthocardia (Schedocardia) brewerii (Gabb. 1864) 74333 2 Nollusca Pelecypoda Veneroida Veneridae Pelecyora SD. 74334 7 Hoilusca Pelecypoda Veneroida Veneridae cf. Pelecyora SD. 74335 2 Hoilusca Pelecypoda Veneroida Veneridae Callista SD. 74336 8 Hoilusca Pelecypoda Veneroida Veneridae cf. Callista SD. 74337 8 NolLusca Pelecypoda Veneroida Veneridae 74338 5 Nollusca Pelecypoda Veneroida Veneridae 74339 1 Hoilusca Pelecypoda Veneroida Tellinidae Tellina SD. cf. T. soledadensis Hanna, 1927 74340 1 Hoilusca Pelecypoda Veneroida Tellinidae Tellina SD. 74341 6 Nollusca Pelecypoda Veneroida Tellinidae Tellina SD. 74342 1 Hoilusca Pelecypoda Veneroida SoIenidae Solena (Eosolen) novacularis (Anderson & Hanna. 1928) 74343 2 Hoilusca Pelecypoda Veneroida Psanmobi idae Gari sp. 74344 10 Nollusca Pelecypoda Hyoida Corbulidae Corbula SD. 74345 1 Hoilusca Pelecypoda 74346 8 Hoilusca Scaphopoda Dentali idae Dentalium stentor Anderson & Hanna. 1925 DATE 11/08/99 TIHE 15:22:41 SAN DIEGO NATURAL HISTORY HUSEUH DEPARTHENT OF PALEONTOLOGY FAUNAL LIST FOR LOCALITY 4345 Faraday Avenue Extension PAGE 2 PAL240 SPECIHEN NUHBER OF NUHBER I TENS PHYLUM CLASS ORDER FAMILY SPECIES 74347 74348 74349 74350 Tracheophyta IchnofossiI Tracheophyta Chordata Angiospermophyta Angiospermophyta Chondrichthyes Hagnoliopsida Hyliobatiformes Combretaceae Hyliobatidae Diopatrichnus roederensis Kern, 1978 Terminalia sp. cf. Nvliobatis sp. • ^ « • DATE 11/08/99 TIHE 13:38:19 SAN DIEGO NATURAL HISTORY HUSEUH DEPARTHENT OF PALEONTOLOGY LOCALITY CARD LOCALITY # LOCALITY NAHE 4346 Faraday Avenue Extension FIELD NUMBER JLP25July99 LOCATION COUNTRY U.S.A. STATE CA COUNTY San Diego CITY Carlsbad LATITUDE SS" 8' 1"N VARIANCE LONGITUDE 117"18' 4"W UTH 11 471910 3665955 VARIANCE STRATIGRAPHIC POSITION GROUP FOfMATION Santiago Formation HEHBER INFORHAL NAHE member C SECT TWNSP DIREC RANGE DIR LOCATION IN SECTION unsurveyed ELEVATION 56 FT MAP NAME San Luis Rey, CA HAP SCALE 1:24000 HAP SOURCE USGS 1968(1975) ERA Cenozoic SYSTEH Paleogene SER/EPOCH middle Eocene AGE/STAGE NALHA ZONE NAHE LITHOLOGY DEPOSITIONAL ENVIRONHENT slst marine CITATION FIELD NOTES PHOTOS ACCESS NO Y COLLECTOR J.L. Pfanner 25 Jul 1999 COHPILED BY J.L. Pfanner 6 Oct 1999 ENTERED BY N.S. Rugh 7 Oct 1999 LOCALITY DESCRIPTION This Locality was discovered during grading for the western extension of Faraday Avenue in Carlsbad. The roadway extends Faraday Avenue from its current terminus near Halley Drive at the head of Hacario Canyon, west to its intersection with the new Cannon Road extension just east of the Hacario Canyon bridge. Grading occured atong the north side of Hacario Canyon on the south side of Evan's Point. Locality 4346 was discovered in the roadcut exposure (north side) at engineering station 35 + 25'. This station is 2525 feet southeast of the intersection of Faraday Avenue and Cannon Road. Fossils were collected from a partially concretionary gray-green, sandy siltstone horizon. This horizon lies directly below the siltstone bed that produced locality 4345. The fossi I-producing horizon was part of a dipping (N15 degees E, 10 degrees NU) Eocene stratigraphic sequence at least 100 feet thick. A composite secticHi was measured between engineering stations 27 + 00 and 36 + 00 and extended from elevation 40 feet in a deep canyon clean out to a topographic high of 140 feet on a hilltop. The section begins with a gray-green laminated siltstone unit with two distinct concretionary horizons and a thin orange, friable sandstone marker bed. Localities 4345 - 4347 were all coUected from the stratigraphic interval between the concretionary horizons. Approximately 67 feet above the base of the exposed section is a sharp contact with a 40 foot thick unit of krtiite, fine-grained friable sanstone. This sandstone is in turn overlain by another sequence of gray-green, laminated, slightly indurated siltstone. Fossils were coUected by pluck-and-run. Fossils collected from this locality include indurated molds and casts of marine molluscs. This locality has been capped with fill material and landscaped. Compiled by: J.L. Pfanner and T.A. Demere Donor: City of Carlsbad Locality: 4346 DATE 11/08/99 TIHE 15:23:08 SAN DIEGO NATURAL HISTORY HUSEUH DEPARTHENT OF PALEONTOLOGY FAUNAL LIST FOR LOCALITY 4346 Faraday Avenue Extension PAGE 1 PAL285 SPECIHEN NUHBER OF NUHBER ITENS DESCRIPTION SPECIHEN NAHE 74352 1 steinkern, valve, right, with some shell 74351 1 steinkern, pair 74353 1 steinkern, pair, with shell material Acanthocardia (Schedocardia) brewerii (Gabb, 1864) Crassatella uvasana Conrad, 1855 Harcia (Hercimonia) bunkeri (Hanna, 1927) DATE 11/08/99 TIHE 15:22:46 SAN DIEGO NATURAL HISTORY HUSEUM DEPARTHENT OF PALEONTOLOGY FAUNAL LIST FOR LOCALITY 4346 Faraday Avenue Extension PAGE 1 PAL240 SPECIHEN NUHBER OF NUMBER ITEMS PHYLUM CLASS ORDER FAMILY SPECIES 74351 74352 74353 Mollusca HoUusca Hoilusca Pelecypoda Pelecypoda Pelecypoda Veneroida Veneroida Veneroida Crassatellidae Cardi idae Veneridae Crassatella uvasana Conrad, 1855 Acanthocardia (Schedocardia) brewerii (Gabb, 1864) Harcia (Nercimonia) bunkeri (Harma, 1927) DATE 11/08/99 TIHE 15:28:48 SAN DIEGO NATURAL HISTORY HUSEUM DEPARTHENT OF PALEONTOLOGY LOCALITY CARD LOCALITY # LOCALITY NAHE 4347 Faraday Avenue Extension FIELD NUHBER JLP11Aug99 LOCATION COUNTRY U.S.A. STATE CA COUNTY San Diego CITY Carlsbad LATITUDE 33= 7'59"N VARIANCE LONGITUDE ^^7'^R' 0"U UTH 11 472026 3665874 VARIANCE STRATIGRAPHIC POSITION GROUP FORHATION Santiago Formation NEHBER INFORHAL NAHE member C SECT TUNSP DIREC RANGE DIR LOCATION IN SECTION unsurveyed ELEVATION 101 FT HAP NANE San Luis Rey, CA HAP SCALE 1:24000 MAP SOURCE USGS 1968(1975) ERA Cenozoi c SYSTEH Paleogene SER/EPOCH middle Eocene AGE/STAGE NALHA ZONE NAHE LITHOLOGY DEPOSITIONAL ENVIRONHENT slst marine CITATION FIELD NOTES PHOTOS ACCESS NO. Y COLLECTOR J.L. Pfanner 11 Aug 1999 COMPILED BY J.L. Pfanner 6 Oct 1999 ENTERED BY N.S. Rugh 7 Oct 1999 LOCALITY DESCRIPTION This locality was discovered during grading for the western extension of Faraday Avenue in Carlsbad. The roadway extends Faraday Avenue from its current tenninus near Halley Drive at the head of Hacario Canyon, west to its intersection with the new Cannon Road extension just east of the Hacario Canyon bridge. Grading occured along the north side of Hacario Canyon on the south side of Evan's Point. Locality 4346 was discovered in the roadcut exposure (north side) at engineering station 40 + 50'. This station is 3050 feet southeast of the intersection of Faraday Avenue and Cannon Road. Fossils were collected from a partially concretionary gray-green, sandy siltstone horizon. This horizon lies directly below the siltstone bed that produced locality 4345. The fossi I-producing horizon was part of a dipping (N15 degees E, 10 degrees NU) Eocene stratigraphic sequence at least 100 feet thick. A coinwsite section was measured between engineering stations 27 + 00 and 36 + 00 and extended from elevation 40 feet in a deep canyon clean out to a topographic high of 140 feet on a hilltop. The section begins with a gray-green laminated siltstone unit with two distinct concretionary horizons and a thin orange, friable sandstone marker bed. Localities 4345 - 4347 were all collected from the stratigraphic interval between the concretionary horizons. Approximately 67 feet above the base of the exposed section is a sharp contact with a 40 foot thick mit of white, fine-grained friable sanstone. This sandstone is in turn overlain by another sequence of gray-green, laminated, slightly indurated siltstone. Fossils were collected by pluck-and-run. Fossils collected from this locality include indurated molds and casts of marine molluscs. This locality has been capped with fill material and landscaped. Compiled by: J.L. Pfarmer and T.A. Demere Donor: City of Carlsbad Locality: 4347 DATE 11/08/99 TIHE 15:28:31 SAN DIEGO NATURAL HISTORY HUSEUH DEPARTHENT OF PALEONTOLOGY FAUNAL LIST FOR LOCALITY 4347 Faraday Avenue Extension PAGE 1 PAL285 SPECIHEN NUHBER OF NUHBER ITEHS DESCRIPTION SPECIHEN NAHE 74379 1 stem material Ang i ospermophyta 74378 3 burrows, packed with shell casts & molds DioDatrichnus roederensis Kern. 1978 74377 1 burrow cast Oohiomoroha SD. 74364 2 mold and cast Gastropoda 74365 1 steinkern Gastropoda 74355 1 steinkern Calyptraea diegoana (Conrad. 1855) 74359 3 molds and casts, partial FicoDsis coixieriana Stewart. 1927 74358 3 steinkerns Naticidae 74357 3 molds and casts, partial Teionia moragi (Stewart. 1926) 74356 3 molds and casts Ectinochilus (Hacilentos) macilentus (White. 1889) 74354 1 steinkern, partial, in matrix Turritella uvasana aoolinae Harma. 1927 74362 2 mold and cast Conus SD. 74360 1 steinkern, in matrix Fasciolariidae 74361 1 mold cf. Ancilla SD. 74363 2 mold and cast Surculites mathewsonii (Gabb. 1864) 74375 2 mold and cast Pelecypoda 74373 1 steinkern, valve, partial Corbula so. 74374 1 burrow casts, in wood Teredo SD. 74366 1 steinkern, valve, right, in matrix Nuculana so. 74367 1 mold, valve, partial, missing hinge area Cardium sorrentoensis Hanna. 1927 74368 3 molds and casts Venericardia SD. 74369 2 steinkerns, valve ft pair, partial Crassatella uvasana Conrad. 1855 74372 2 steinkerns, valves, left and right Veneridae 74371 5 steinkerns, valves, right and left Veneridae 74370 3 steinkerns, valves, left and right Pelecvora SD. 74376 1 steinkern, in matrix Dentalium sp. DATE 11/08/99 TIHE 15:28:21 SAN DIEGO NATURAL HISTORY HUSEUH DEPARTHENT OF PALEONTOLOGY FAUNAL LIST FOR LOCALITY 4347 Faraday Avenue Extension PAGE 1 PAL240 SPECIHEN NUMBER OF NUHBER ITEHS PHYLUH CLASS ORDER FAHILY SPECIES 74354 1 Nollusca Gastropoda Hesogastropoda Turritellidae Turritella uvasana apDlinae Hanna. 1927 74355 1 MoIlusca Gastropoda Hesogastropoda Crepidulidae Calyptraea diegoana [Conrad. 1855) 74356 3 Mollusca Gastropoda Hesogastropoda Strong} idae Ectinochilus (Hacilentos) macilentus (Uhite. 74357 3 Mollusca Gastropoda Hesogastropoda Naticidae Teionia moragi (Stewart. 1926) 74358 3 Mollusca Gastropoda Hesogastropoda Naticidae 74359 3 NolLusca Gastropoda Hesogastropoda Ficidae Ficopsis coooeriana Stewart. 1927 74360 1 Mollusca Gastropoda Neogastropoda Fasciolari idae 74361 1 Mollusca Gastropoda Neogastropoda Olividae cf. Ancilla SD. 74362 2 Mollusca Gastropoda Neogastropoda Conidae Conus SD. 74363 Z Mollusca Gastropoda Neogastropoda Turridae Surculites mathewsonii (Gabb. 1864) 74364 2 NolLusca Gastropoda 74365 1 Hoilusca Gastropoda 74366 1 HoUusca Pelecypoda Nuculoida Nuculanidae Nuculana SD. 74367 1 Mollusca Pelecypoda Veneroida Cardiidae Cardium sorrentoensis Hanna. 1927 74368 3 Mollusca Pelecypoda Veneroida Carditidae Venericardia SD. 74369 2 Mollusca Pelecypoda Veneroida Crassatellidae Crassatella uvasana Conrad. 1855 74370 3 Mollusca Pelecypoda Veneroida Veneridae Pelecvora SD. 74371 5 NolLusca Pelecypoda Veneroida Veneridae 74372 2 Hoilusca Pelecypoda Veneroida Veneridae 74373 1 HoUusca Pelecypoda Hyoida Corbulidae CorkHJla SP. 74374 1 Nollusca Pelec^Mda Hyoida Teredinidae Teredo SD. 74375 2 NolLusca Pelecypoda 74376 1 HoUusca Scaphopoda Dentaliidae Dentalium SD. 74377 1 Ichnofossi I ODhiomoroha so. 74378 3 Ichnofossi L DioDatrichnus roederensis Kern. 1978 74379 1 Tracheophyta Angiospermophyta SAN DIEGO NATURAL HISTORY HUSEUH PAGE 1 DEPARTHENT OF PALEONTOLOGY FARADAY AVENUE EXTENSION LOCALITY NUHBERS SPECIES 4345 4346 4347 1 -- 1 Angiospermophyta 1 -- -- Terminalia sp. 5 -- 3 Diopatrichnus roederensis Kern, 1978 1 QDhiomorpha sp. 3 -- 3 Gastropoda 5 -- Architectonica sp. 1 -- -- Trichotropis (7) lajollaensis Hanna, 1927 1 -- 1 CalvDtraea diegoana (Conrad, 1855) 10 -- 3 Ficopsis coooeriana Stewart, 1927 5 3 Naticidae 2 -- -- Sinum sp. 3 Teionia moragi (Stewart, 1926) 8 -- 3 Ectinochilus (Hacilentos) macilentus (Uhite, 1889) 3 -- 1 Turritella uvasana applinae Hanna, 1927 1 -- -- Neogastropoda 1 -- 2 Conus sp. 1 Fasciolariidae 2 -- -- Muricidae? 1 -- AnciI la sp. 1 cf. AnciUa sp. 2 Surculites mathewsonii (Gabb, 1864) 1 -- -- Opisthobranchia 1 -- 2 Pelecypoda 3 -- Glvcvmeris sp. 10 -- 1 Corbula sp. 1 Teredo sp. 4 Brachidontes sp. 2 -- 1 Nuculana sp. 1 -- -- Acila sp. 2 1 -- Acanthocardia (Schedocardia) brewerii (Gabb, 1864) 1 Cardium sorrentoensis Hanna, 1927 4 -- 3 Venericardia sp. 1 2 Crassatella uvasana Conrad, 1855 2 -- -- Gari sp. 1 Solena (Eosolen) novacularis (Anderson & Hanna, 1928) 1 -- -- Tel Iina sp. cf. T. soledadCTsis Hanna, 1927 7 -- -- Tellina sp. 13 7 Veneridae 2 -- -- Callista sp. 8 -- -- cf. Callista sp. 1 -- Harcia (Hercimonia) bunkeri (Hanna, 1927) 2 -- 3 Pelecyora sp. 7 -- -- cf. Pelecvora sp. 1 Dentalium sp. 8 -- -- Dentalium stentor Anderson & Hanna, 1925 1 -- -- cf. Hyliobatis sp.