Also known as LSJU 442 (Wiedey 1928)

Where: Kern County, California (35.4° N, 118.8° W: paleocoordinates 35.3° N, 113.6° W)

• coordinate stated in text

When: Round Mountain Formation, Langhian (16.0 - 13.8 Ma)

• SComment by White on this stratigraphic allocation: "Fossils at LSJU loc. 2641 range through a stratigraphic section totalling 120 feet in thickness. This unit is predominantly a fine silty sand and sandy silt which may represent a sandy facies of the lower Round Mountain silt as exposed at Round Mountain. The sand content, on the other hand, might justify interpretation of the unit as the uppermost portion of the Olcese sand." AGE: Changed to Langhian and "Round Mountain Silt" following EPICC stratigraphic revision.

Environment/lithology: marine; poorly lithified, gray siltstone

Size class: macrofossils

Collected by D. B. Birch, R. T. White, L. T. Martin, E. A. Watson, A. M .Keen in 1938 - 1940

• Collectors: Donald C Birch, 1938; Robert T. White, 1939; Lois T. Martin and Elizabeth A. Watson, 1940; A. Myra Keen, 1939.

Primary reference: A. M. Keen. 1943. New mollusks from the Round Mountain Silt (Temblor) Miocene of California. Transactions of the San Diego Society of Natural History 10(2):25-60 [J. Marcot/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 206404: authorized by Jonathan Marcot, entered by Jonathan Marcot on 14.11.2019

Creative Commons license: CC BY (attribution)