Site #1, Lawrence Co. [Deadwood Fm] (Cambrian of the United States)

Where: Lawrence County, South Dakota (44.4° N, 103.7° W: paleocoordinates 11.8° S, 82.2° W)

• small collection-level geographic resolution

When: Crepicephalus trilobite zone, Deadwood Formation, Dresbachian (497.0 - 485.4 Ma)

• AGE: Dresbachian; refined by A. Hendy (6/2009) on the basis of biostratigraphic data (= Crepicephalus zone).

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, pebbly, gray limestone

• brownish gray medium crystalline limestone, that contains both large and small pebbles.

Primary reference: C. H. Hu. 1975. Ontogenies of three late Cambrian trilobites from the Deadwood Formation, northern Black Hills, South Dakota. Bulletins of American Paleontology 67(287):251-272 [M. Patzkowsky/P. Borkow]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8936: authorized by Mark Patzkowsky, entered by Phil Borkow on 07.09.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Ptychopariida - Crepicephalidae
Coosia albertensis