Where: Lincoln County, Nevada (37.9° N, 114.6° W: paleocoordinates 3.2° S, 93.1° W)

• outcrop-level geographic resolution

When: Amecephalus arrojosensis zone, Comet Shale Member (Pioche Shale Formation), Solvan (510.2 - 504.5 Ma)

• 33.1 to 34m above base of section.

• bed-level stratigraphic resolution

Environment/lithology: lithified shale

Collection methods: Only trilobites are included in the collection

Primary reference: F. A. Sundberg and L. B. McCollum. 2000. Ptychoparid trilobites of the Lower-Middle Cambrian boundary interval, Pioche Shale, southeastern Nevada. Journal of Paleontology 74(4):604-630 [M. Patzkowsky/P. Borkow/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 9235: authorized by Mark Patzkowsky, entered by Phil Borkow on 10.10.2000

Creative Commons license: CC BY (attribution)