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 190781: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017, edited by Austin Hendy
Creative Commons license: CC BY (attribution)
Taxonomic list
Anthozoa | |
"Flabellum remondianum" = Flabellum cuneiforme
"Flabellum remondianum" = Flabellum cuneiforme Lonsdale 1845 stony coral | |
"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 | |
Turris sp. Röding 1798 turrid | |
"Perissolax tricarnatus" = Pseudoperissolax tricarnatus
"Perissolax tricarnatus" = Pseudoperissolax tricarnatus Weaver 1905 murex snail | |
"Neptunea mucronata" = Sycum mucronatum
"Neptunea mucronata" = Sycum mucronatum Gabb 1869 snail | |
"Brachysphingus liratus" = Brachysphingus sinuatus
"Brachysphingus liratus" = Brachysphingus sinuatus Gabb 1869 true whelk | |
Amauropsis martinezensis, "Lunatia hornii" = Polinices hornii
Amauropsis martinezensis Dickerson 1914 moon snail
"Lunatia hornii" = Polinices hornii Gabb 1864 moon snail | |
Scaphopoda | |
Dentalium cooperi Gabb 1864 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 | |
? Macrocallista packi n. sp.
? Macrocallista packi n. sp. Dickerson 1914 venus clam | |
Glycymerita major Stanton 1896 clam | |
Cucullaea mathewsonii Gabb 1864 clam | |
"Lima haseltinei" = Acesta (Plicacesta) haseltinei
"Lima haseltinei" = Acesta (Plicacesta) haseltinei Dickerson 1914 file clam |