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 190771: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"Nucula (Acila) cf. truncata" = Portlandia arctica
"Nucula (Acila) cf. truncata" = Portlandia arctica Gray 1824 clam | |
"Leda gabbi" = Nuculana (Saccella) gabbii
"Leda gabbi" = Nuculana (Saccella) gabbii Conrad 1866 pointed nut clam | |
"Pinna barrowsi" = Pinna (Pinna) barrowsi
"Pinna barrowsi" = Pinna (Pinna) barrowsi Dickerson 1914 oyster | |
Cucullaea mathewsonii Gabb 1864 clam | |
Anthozoa | |
"Trochocyathus zitteli" = Palaeopsammia zitteli
"Trochocyathus zitteli" = Palaeopsammia zitteli Vaughan 1900 stony coral |