UCMP 1543 (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 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

Bivalvia
 Carditida - Crassatellidae
"Crassatellites unioides" = Crassatella
"Crassatellites unioides" = Crassatella clam
 Cardiida - Tellinidae
Tellina "sp. b" Linnaeus 1758 tellin clam
Gastropoda
 Ptenoglossa - Epitoniidae
Acrilla (Ferminoscala) berthiaumei Durham 1937 wentletrap
 Neogastropoda - Olividae
Olivella claytonensis n. sp. Dickerson 1914 olive snail
 Neogastropoda - Buccinidae
"Brachysphingus liratus" = Brachysphingus sinuatus
"Brachysphingus liratus" = Brachysphingus sinuatus Gabb 1868 true whelk
 Neogastropoda - Fasciolariidae
"Neptunea mucronata" = Fasciolaria mucronata
"Neptunea mucronata" = Fasciolaria mucronata Gabb 1868 tulip snail
 Neogastropoda - Turridae
Surcula merriami Dickerson 1914 turrid
 Stromboidea - Strombidae
Fusus mathewsonii Gabb 1864 true conch
 Naticoidea - Naticidae
"Lunatia hornii" = Polinices (Euspira) hornii
"Lunatia hornii" = Polinices (Euspira) hornii Gabb 1864 moon snail
 Heterostropha - Acteonidae
"Ringinella pinguis" = Tornatellaea pinguis
"Ringinella pinguis" = Tornatellaea pinguis Gabb 1864 snail
 Vetigastropoda - Discohelicidae
Discohelix sp. Dunker 1847 snail