Also known as HG#94.2
Where: Park County, Wyoming (44.8° N, 109.3° W: paleocoordinates 7.8° S, 82.3° W)
• outcrop-level geographic resolution
When: Illaenurus zone, Sage Member (Snowy Range Formation), Trempealeauan (492.5 - 485.4 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 9921: authorized by Mark Patzkowsky, entered by Phil Borkow on 31.01.2001
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Cyanobacteria indet. Stanier 1973 | |
Renalcis | |
| |
unclassified | |
Echinodermata indet. Klein 1754 Represents at least 2 other echinoderms of unknown affinity and the unknown pelmatozoan holdfast.
| |
Edrioasteroidea | |
Edrioasteroidea indet. Billings 1858 | |
Stylophora | |
Stylophora indet. Gill and Caster 1960 | |
Trilobita | |
Trilobita indet. Walch 1771 trilobite |