Where: Contra Costa County, California (38.0° N, 122.2° W: paleocoordinates 43.9° N, 100.0° W)
• coordinate based on nearby landmark
When: Martinez Formation, Paleocene (66.0 - 56.0 Ma)
• Martinez Fm. discussed as Eocene by Dickerson 1914, but rocks now regarded as Paleocene following Stewart, Ralph, 1949, Lower Tertiary stratigraphy of Mount Diablo, Marysville Buttes, and west border of lower Central Valley of California: U.S. Geological Survey Oil and Gas Investigations Preliminary Chart, OC-34.
Environment/lithology: marine; lithology not reported
Size classes: macrofossils, mesofossils
Reposited in the UCMP
Primary reference: R. E. Dickerson. 1914. Fauna of the Martinez Eocene of California. Bulletin of the Department of Geology, University of California 6:61-180 [P. Holroyd/P. Holroyd/A. Hendy]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 190791: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Turritella pachecoensis Stanton 1896 turret shell | |
? Siphonalia lineata Stanton 1896 true whelk | |
"Lunatia hornii" = Polinices hornii
"Lunatia hornii" = Polinices hornii Gabb 1864 moon snail | |
"Cylichna costata" = Scaphander (Mirascapha) costatus
"Cylichna costata" = Scaphander (Mirascapha) costatus Gabb 1864 snail | |
Bivalvia | |
Pholadomya nasuta Gabb 1864 clam | |
Teredo sp. Linnaeus 1758 clam | |
Meretrix sp. Lamarck 1799 venus clam | |
? Psammobia cylindrica Dickerson 1914 clam | |
"Solen stantoni" = Solena (Eosolen) stantoni
"Solen stantoni" = Solena (Eosolen) stantoni Weaver 1905 clam |