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 190780: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017, edited by Jonathan Marcot and Austin Hendy
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"Leda packardi" = Nuculana (Saccella) packardi, "Leda gabbi" = Nuculana (Saccella) gabbii
"Leda packardi" = Nuculana (Saccella) packardi Dickerson 1914 pointed nut clam
"Leda gabbi" = Nuculana (Saccella) gabbii Conrad 1866 pointed nut clam | |
Modiolus sp. Lamarck 1801 mussel | |
"? Lima claytonensis n. sp." = Limea (Isolimea) claytonensis
"? Lima claytonensis n. sp." = Limea (Isolimea) claytonensis Dickerson 1914 file clam | |
Glycymerita major Stanton 1896 clam | |
"Crassatellites claytonensis n. sp." = Crassatella claytonensis, "Crassatellites grandis" = Crassatella uvasana, "Crassatellites unioides" = Crassatella unioides
"Crassatellites claytonensis n. sp." = Crassatella claytonensis Dickerson 1914 clam
"Crassatellites grandis" = Crassatella uvasana Conrad 1855 clam
"Crassatellites unioides" = Crassatella unioides Stanton 1896 clam | |
"Cardium cooperi" = Nemocardium (Nemocardium) linteum
"Cardium cooperi" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle | |
Paphia cf. clarki Dickerson 1914 venus clam | |
Gastropoda | |
Surcula merriami Dickerson 1914 snail | |
Discohelix sp. Dunker 1847 snail |