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 190788: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
Dentalium sp. Linnaeus 1758 tusk shell | |
Gastropoda | |
Turritella pachecoensis Stanton 1896 turret shell | |
"Lunatia hornii" = Polinices hornii
"Lunatia hornii" = Polinices hornii Gabb 1864 moon snail | |
Urosyca caudata Gabb 1869 fig shell | |
"Neptunea (Tritonofusus) cretacea" = Neptunea cretacea, "Brachysphingus liratus" = Brachysphingus sinuatus
"Neptunea (Tritonofusus) cretacea" = Neptunea cretacea Gabb 1869 true whelk
"Brachysphingus liratus" = Brachysphingus sinuatus Gabb 1869 true whelk | |
"Perissolax tricarnatus" = Pseudoperissolax tricarnatus
"Perissolax tricarnatus" = Pseudoperissolax tricarnatus Weaver 1905 murex snail | |
Xenophora zitteli Weaver 1905 carrier shell | |
Bivalvia | |
? Paphia sp. Röding 1798 venus clam | |
"Cardium cooperi" = Nemocardium (Nemocardium) linteum
"Cardium cooperi" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle | |
"Crassatellites grandis" = Crassatella uvasana, "Crassatellites unioides" = Crassatella unioides
"Crassatellites grandis" = Crassatella uvasana Conrad 1855 clam
"Crassatellites unioides" = Crassatella unioides Stanton 1896 clam | |
Anthozoa | |
"Trochocyathus zitteli" = Palaeopsammia zitteli
"Trochocyathus zitteli" = Palaeopsammia zitteli Vaughan 1900 stony coral |