Near Rock Run, along Alabama-Georgia state line at midlength (Cambrian of the United States)

Where: Cherokee County, Alabama (34.0° N, 85.4° W: paleocoordinates 28.1° S, 89.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Saukia trilobite zone, Copper Ridge Dolomite Formation, Trempealeauan (492.5 - 485.4 Ma)

• Above Gymnosolen Zone (20' - 40').

• group of beds-level stratigraphic resolution

Environment/lithology: lithified dolomite and chert

• Just above the pipe chert (20 to 40 ft. above it at the only place where fossils were collected from bedrock) is a zone characterized by the distinctive bellerophontacean gastropod Cloudia buttsi Knight. It occurs in four or five different kinds of chert, but the most common is ash gray, gritty, hard, tough, and irregularly cavernous. Although scarce, this fossil can often be found when a persistent search is made.

Size class: macrofossils

Reposited in the USNM

Primary reference: J. B. Knight. 1947. Some new Cambrian bellerophont gastropods. Smithsonian Miscellaneous Collections 106(17):1-11 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 156380: authorized by Pete Wagner, entered by Pete Wagner on 20.05.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Tergomya
 Cyrtonellida - Cyrtolitidae
Cloudia buttsi n. gen. n. sp.
Cloudia buttsi n. gen. n. sp. Knight 1947