UCMP 1656 (Paleocene of the United States)

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 190784: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Cucullaeidae
Cucullaea mathewsonii Gabb 1864 clam
 Carditida - Crassatellidae
"Crassatellites unioides" = Crassatella
"Crassatellites unioides" = Crassatella clam
 Cardiida - Cardiidae
"Cardium cooperi" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
Gastropoda
 Naticoidea - Naticidae
Amauropsis martinezensis Dickerson 1914 moon snail
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium cooperi Gabb 1864 tusk shell
Anthozoa
 Scleractinia - Guyniidae
"Trochocyathus zitteli" = Palaeopsammia zitteli
"Trochocyathus zitteli" = Palaeopsammia zitteli Vaughan 1900 stony coral