Where: Wyoming (42.6° N, 109.2° W: paleocoordinates 7.8° S, 85.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Dry Creek Shale Formation, Dresbachian (501.0 - 488.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Primary reference: A. B. Shaw. 1956. A Cambrian Aphelaspis fauna from Steele Butte, near Boulder, Wyoming. Journal of Paleontology 30(1):48-52 [S. Peters/S. Peters/P. Wagner] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 56146: authorized by Shanan Peters, entered by Shanan Peters on 13.11.2005