Where: Clark County, Nevada (36.2° N, 115.0° W: paleocoordinates 2.8° S, 97.1° W)

• coordinate estimated from map

When: Pioche Shale Formation, Caerfai to Caerfai (538.8 - 497.0 Ma)

• 27 feet thick

• group of beds-level stratigraphic resolution

Environment/lithology: marginal marine; lithified, green, sandy shale

Size class: macrofossils

Primary reference: P. D. Pack and H. B. Gayle. 1971. A new Olenellid trilobite, Biceratops nevadensis, from the Lower Cambrian near Las Vegas, Nevada. Journal of Paleontology 45(5):893-898 [M. Patzkowsky/P. Borkow/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 9624: authorized by Mark Patzkowsky, entered by Phil Borkow on 23.03.2001

Creative Commons license: CC BY (attribution)