UCMP V-2838, Lafayette Dam (Miocene of the United States)

Where: Contra Costa County, California (37.9° N, 122.1° W: paleocoordinates 37.1° N, 117.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: "Orinda" Formation, Miocene (23.0 - 5.3 Ma)

Environment/lithology: terrestrial; siliciclastic sediments

Size class: macrofossils

Reposited in the UCMP

Primary reference: R. A. Stirton. 1939. Cenozoic Mammal Remains From the San Francisco Bay Region. University of California Publications, Bulletin of the Department of Geological Sciences 24(13):339-410 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 19415: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• this is the closest locality to a basalt flow 350 m above the base of the Contra Costa Group in Happy (= Pleasant?) Valley NW of Lafayette, Contra Costa Co. dated by Creely et al. 1982 at 8.7 +/- 0.9 Ma, but is still probably 1 mi to the S or SW; Contra Costa Group localities in the Mulholland Hill/Bolinger Canyon/Rocky Ridge area are probably equivalent but are about 5 mi away
Show authors, comments, and common names
Mammalia
 Artiodactyla - Camelidae
Camelidae indet.
Camelidae indet. Gray 1821 camel