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Pyramid Hill Sand Member grit zone (Oligocene of the United States)

Also known as LACMVP Loc. 1603, 1626, 1627; UCMP Loc. V-7032

Where: Kern County, California (35.5° N, 118.8° W: paleocoordinates 35.2° N, 109.8° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Pyramid Hill Member (Jewett Formation), Chattian (28.4 - 23.0 Ma)

• grit zone; age assignments vary; age for this collection originally listed as Chattian after Scheirer and Magoon, 2007 and Barboza et al., 2017; but Aquitanian after discussion in Shimada et al. 2014

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary sandstone

• contains pebbles, rounded black chert grains, angular quartz clasts, and is referred to as the ""grit zone"" by some geologists

Size class: macrofossils

Preservation: concretion, permineralized, original phosphate

Reposited in the LACM

Collection methods: surface (in situ), chemical, mechanical,

• Pyramid Hill Local Fauna

Primary reference: F. M. Anderson. 1911. The Neocene deposits of Kern River, California, and the Temblor Basin. Proceedings of the Califonia Academy of Sciences 3:73-148 [M. Uhen/M. Uhen/M. Uhen] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 11601: authorized by Mark Uhen, entered by Mark Uhen on 23.08.2001, edited by Patricia Holroyd and Austin Hendy

Creative Commons license: CC BY (attribution)