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 190783: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
"Natica (Gyrodes) lineata n. sp." = Lacunaria striata
"Natica (Gyrodes) lineata n. sp." = Lacunaria striata Gabb 1869 moon snail | |
Bivalvia | |
"Leda alaeformis" = Nuculana (Saccella) alaeformis
"Leda alaeformis" = Nuculana (Saccella) alaeformis Gabb 1869 pointed nut clam | |
Pholadomya nasuta Gabb 1864 clam | |
"? Tapes quadrata" = Pitar quadratus
"? Tapes quadrata" = Pitar quadratus Gabb 1864 venus clam | |
"Cardium cooperi" = Nemocardium (Nemocardium) linteum
"Cardium cooperi" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle |