UCMP 1828 (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 190791: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pholadida - Teredinidae
Teredo sp. Linnaeus 1758 clam
 Cardiida - Veneridae
Meretrix sp. Lamarck 1799 venus clam
 Cardiida - Psammobiidae
? Psammobia cylindrica Dickerson 1914 clam
 Solenida - Solenidae
"Solen stantoni" = Solen (Eosolen) stantoni
"Solen stantoni" = Solen (Eosolen) stantoni Weaver 1905 clam
 Pholadomyida - Pholadomyidae
Pholadomya nasuta Gabb 1864 clam
Gastropoda
 Opisthobranchia - Cylichnidae
"Cylichna costata" = Scaphander costatus
"Cylichna costata" = Scaphander costatus Gabb 1864 snail
 Neogastropoda - Buccinidae
 Naticoidea - Naticidae
"Lunatia hornii" = Polinices (Euspira) hornii
"Lunatia hornii" = Polinices (Euspira) hornii Gabb 1864 moon snail
 Sorbeoconcha - Turritellidae
Turritella pachecoensis Stanton 1896 turret shell