UCMP 1746 (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 190788: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Carditida - Crassatellidae
"Crassatellites unioides" = Crassatella, Crassatellites grandis
"Crassatellites unioides" = Crassatella clam
Crassatellites grandis Gabb 1864 clam
 Cardiida - Veneridae
? Paphia sp. Röding 1798 venus clam
 Cardiida - Cardiidae
"Cardium cooperi" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
Gastropoda
 Neogastropoda - Buccinidae
"Brachysphingus liratus" = Brachysphingus sinuatus Gabb 1868 true whelk
 Ficoidea - Ficidae
"Urosyca caudata" = Priscoficus caudatus Gabb 1868 fig shell
Perissolax tricarnatus Weaver 1905 fig shell
 Naticoidea - Naticidae
"Lunatia hornii" = Polinices (Euspira) hornii
"Lunatia hornii" = Polinices (Euspira) hornii Gabb 1864 moon snail
 Xenophoroidea - Xenophoridae
Xenophora zitteli Weaver 1905 carrier shell
 Sorbeoconcha - Turritellidae
Turritella pachecoensis Stanton 1896 turret shell
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Anthozoa
 Scleractinia - Guyniidae
"Trochocyathus zitteli" = Palaeopsammia zitteli
"Trochocyathus zitteli" = Palaeopsammia zitteli Vaughan 1900 stony coral