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 190776: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Discohelix sp. Dunker 1847 snail | |
Acrilla (Ferminoscala) berthiaumei Durham 1937 wentletrap | |
Olivella claytonensis n. sp.
Olivella claytonensis n. sp. Dickerson 1914 olive snail | |
"Brachysphingus liratus" = Brachysphingus sinuatus
"Brachysphingus liratus" = Brachysphingus sinuatus Gabb 1869 true whelk | |
"Neptunea mucronata" = Sycum mucronatum
"Neptunea mucronata" = Sycum mucronatum Gabb 1869 snail | |
"Fusus mathewsonii" = Surculites mathewsonii
"Fusus mathewsonii" = Surculites mathewsonii Gabb 1864 turrid | |
Surcula merriami Dickerson 1914 snail | |
"Lunatia hornii" = Polinices hornii
"Lunatia hornii" = Polinices hornii Gabb 1864 moon snail | |
"Ringinella pinguis" = Ringicula (Ringicula) pinguis
"Ringinella pinguis" = Ringicula (Ringicula) pinguis Gabb 1864 snail | |
Bivalvia | |
"Crassatellites unioides" = Crassatella unioides
"Crassatellites unioides" = Crassatella unioides Stanton 1896 clam | |
Tellina "sp. b" Linnaeus 1758 tellin clam |