ammonites
USNM 41076, Goldfield Hills, Nevada (Cambrian of the United States)

Where: Esmeralda County, Nevada (37.6° N, 117.3° W: paleocoordinates 1.1° S, 93.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Emigrant Formation, Middle Cambrian (513.0 - 501.0 Ma)

• 15 to 20m above base of Emigrant Formation; Oryctocephalus indicus Biozone

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; gray shale

• "light grey, fissile shale only exposed in rodent burrows and a trenched section"

Reposited in the USNM

Primary reference: F. A. Sundberg and L.B. McCollum. 2003. Early and Mid Cambrian Trilobites from the Outer-shelf Deposits of Nevada and California, USA. Palaeontology 46(5):945-986 [W. Kiessling/B. Brenneis] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 69488: authorized by Wolfgang Kiessling, entered by Benjamin Brenneis on 27.02.2007