Where: Inyo County, California (36.7° N, 118.0° W: paleocoordinates 7.6° N, 44.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Parapopanoceras ammonoid zone, Union Wash Formation, Spathian (251.3 - 247.2 Ma)

• The fossiliferous beds consists of about 6 feet of black limestone, lying about 800 feet above the zone of Meekoceras gracilitatis.

• group of beds-level stratigraphic resolution

Environment/lithology: slope; lithified, black limestone

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: A. Hyatt and J. P. Smith. 1905. The Triassic cephalopod genera of America. United States Geological Survey Professional Paper 40:1-394 [D. Bottjer/C. Powers/M. Clapham] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 33194: authorized by David Bottjer, entered by Catherine Powers on 23.07.2003