Where: Kern County, California (35.0° N, 119.2° W: paleocoordinates 33.4° N, 109.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Pleito Formation (San Lorenzo Group), Early/Lower Oligocene (33.9 - 28.4 Ma)
• STRATIGRAPHIC RELATIONS: From Pleito Fm of the San Lorenzo Group, which unconformably overlies the San Emigdio Fm (Late Eocene), and is unconformably overlain by the Pleito Fm (Early Oligocene) of the San Lorenzo Group. THICKNESS: From bed within unit of formation that reaches 600 ft in thicknes. AGE: Late Eocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: From middle unit of the formation.
• bed-level stratigraphic resolution
Environment/lithology: coastal; lithified, shelly/skeletal, brown, gray, blue, conglomeratic sandstone and lithified, fine-grained, shelly/skeletal sandstone
Size class: macrofossils
Reposited in the UCMP
Collection methods: surface (in situ),
• COLLECTOR: Presumably C. M. Wagner and K. H. Schilling (1917). REPOSITORY: Univeristy of California Collections of Invertebrate Paleontology, presumably UCMP.
Primary reference: C. M. Wagner and K. H. Schilling. 1923. The San Lorenzo Group of the San Emigdio region, California. University of California Publications, Bulletin of the Department of Geological Sciences 14(6):235-276 [A. Hendy/A. Hendy/A. Hendy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 71198: authorized by Austin Hendy, entered by Austin Hendy on 20.04.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
"Turritella lorenzana n. sp." = Turritella variata lorenzana
"Turritella lorenzana n. sp." = Turritella variata lorenzana Wagner and Schilling 1923 turret shell | |
Natica recluziana Deshayes 1839 moon snail | |
Agasoma acuminatum, "Siphonalia andersoni" = Siphonalia (Eosiphonalia) andersoni
Agasoma acuminatum Anderson and Martin 1914 true whelk
"Siphonalia andersoni" = Siphonalia (Eosiphonalia) andersoni Wagner and Schilling 1923 true whelk | |
Bivalvia | |
"Acila shumardi" = Acila (Truncacila) shumardi
"Acila shumardi" = Acila (Truncacila) shumardi Dall 1909 divaricate nutclam | |
"Pecten cf. diabloensis" = Vertipecten kernensis
"Pecten cf. diabloensis" = Vertipecten kernensis Hertlein 1925 scallop entered as "Pecten cf. gabbi," presumably Clark's (1918) homonym of Dall's (1898) name
| |
Pinna sp. Linnaeus 1758 oyster | |
"Metis rostellata" = Psammotreta (Leporimetis) rostellata, Tellina eugenia
"Metis rostellata" = Psammotreta (Leporimetis) rostellata Clark 1918 tellin clam
Tellina eugenia Dall 1909 tellin clam | |
"Dosinia mathewsonii" = Dosinia (Dosinia) whitneyi, Macrocallista pittsburgensis, "Chione cf. lineolata" = Securella cryptolineata
"Dosinia mathewsonii" = Dosinia (Dosinia) whitneyi Gabb 1866 venus clam
Macrocallista pittsburgensis Dall 1900 venus clam
"Chione cf. lineolata" = Securella cryptolineata Clark 1918 venus clam |