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