Also known as CIT 503; UCMP 2577

Where: Kern County, California (35.2° N, 118.3° W: paleocoordinates 35.1° N, 112.4° W)

• coordinate estimated from map

When: Bopesta Formation, Hemingfordian to Hemingfordian (20.4 - 12.5 Ma)

• only the CIT collection is stratigraphically restricted; other records could be from the 270' level
originally described by Buwalda 1916
lowest locality in section and overlies Lone Tree Basalt; underyling tuff breccia was dated at 17.1 (= 17.55) Ma (K-Ar on hornblende biotite: sample KA 478) by Evernden et al. 1964; this unit was referred to as the Kinnick Tuff and redated at 16.5 +/- 0.2 Ma (K-AAr on biotite) and 16.5 +/- 0.8 Ma (K-Ar on hornblende) by Coles et al. 1997

Environment/lithology: terrestrial; sandstone

Size class: macrofossils

Reposited in the UCMP

Primary reference: J. P. Quinn. 1987. Stratigraphy Of The Middle Miocene Bopesta Formation, Southern Sierra Nevada, California. Contributions in Science, Natural History Museum of Los Angeles County 393:1-31 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 19478: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot and Patricia Holroyd

Creative Commons license: CC BY (attribution)