Where: Shasta County, California (40.8° N, 122.1° W: paleocoordinates 13.5° N, 53.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hosselkus Formation, Tuvalian (232.0 - 221.5 Ma)

• Zone of Tropites subbullatus, Trachyceras subzone

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Reposited in the USNM

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 142610: authorized by Matthew Clapham, entered by Matthew Clapham on 14.04.2013

Creative Commons license: CC BY (attribution)