Also known as HG#94.1

Where: Carbon County, Montana (45.2° N, 109.2° W)

• Paleocoordinates: 30.9° N, 112.6° W (Wright 2013)

• outcrop-level geographic resolution

When: Illaenurus zone, Sage Member (Snowy Range Formation), Trempealeauan (490.2 - 486.9 Ma)

• Represent storm deposits. The formation as a whole represents a transitional facies, intermediate between nearshore clastics and outer-shel carbonates. The Sage Member (occurence of hardgrounds) is 36-67m thick with the hardgrounds forming on upper surfaces of carbonate, flat pebble conglomerates.

• member-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, burrowed, hardground, flat-pebble, carbonaceous conglomerate

Primary reference: C. E. Brett, W. D. Liddell, and K. L. Derstler. 1983. Late Cambrian hard substrate communities from Montana/Wyoming: the oldest known hardground encrusters. Lethaia 16(4):281-289 [M. Patzkowsky/P. Borkow]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 9920: authorized by Mark Patzkowsky, entered by Phil Borkow on 31.01.2001

Creative Commons license: CC0 (CC0)