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 71187: authorized by Austin Hendy, entered by Austin Hendy on 20.04.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Calliostoma sp. Swainson 1840 top snail | |
Thais packi Clark 1918 murex snail | |
"Siphonalia andersoni" = Siphonalia (Eosiphonalia) andersoni
"Siphonalia andersoni" = Siphonalia (Eosiphonalia) andersoni Wagner and Schilling 1923 true whelk | |
"Agasoma gravida" = Bruclarkia gravida
"Agasoma gravida" = Bruclarkia gravida Gabb 1866 snail | |
Molopophorus dalli Anderson and Martin 1914 snail | |
Natica recluziana Deshayes 1839 moon snail | |
Bivalvia | |
"Acila shumardi" = Acila (Truncacila) shumardi
"Acila shumardi" = Acila (Truncacila) shumardi Dall 1909 divaricate nutclam | |
"Yoldia cooperii" = Yoldia (Portlandia) cooperii
"Yoldia cooperii" = Yoldia (Portlandia) cooperii Gabb 1865 clam | |
"Panopea aff. estrellana" = Panopea abrupta
"Panopea aff. estrellana" = Panopea abrupta Conrad 1849 clam | |
"Dosinia mathewsonii" = Dosinia (Dosinia) whitneyi, "Antigona mathewsonii" = Amiantis mathewsoni
"Dosinia mathewsonii" = Dosinia (Dosinia) whitneyi Gabb 1866 venus clam
"Antigona mathewsonii" = Amiantis mathewsoni Gabb 1866 venus clam | |
"Spisula ramonensis" = Mactromeris ramonensis
"Spisula ramonensis" = Mactromeris ramonensis Packard 1916 clam | |
"Mytilus mathewsonii" = Crenomytilus mathewsoni
"Mytilus mathewsonii" = Crenomytilus mathewsoni Gabb 1866 mussel |