UCMP V-3607, Las Trampas Creek (Miocene of the United States)

Where: Contra Costa County, California (37.8° 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 19418: authorized by John Alroy, entered by John Alroy on 26.03.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

• probably the "mastodontine" from the "'Orinda'" of the "Rocky Ridge section" mentioned by Richey 1943
 Proboscidea - Gomphotheriidae
Gomphotherium obscurum Leidy 1869 gomphothere