ammonites
Deadwood 21, Deadwood Formation, Cold Spring Creek, South Dakota - Stitt 1998 (Cambrian to of the United States)

Where: Lawrence County, South Dakota (44.4° N, 103.7° W: paleocoordinates 11.6° S, 86.9° W)

• outcrop-level geographic resolution

When: Cedarina dakotaensis zone, Deadwood Formation, Menevian to Menevian (513.0 - 501.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: shoreface; lithified, pebbly, yellow sandstone

• pebble sandstone consists of 2.7 to 15.8 meters of yellowish, medium to thick bedded medium to coarse, cross-bedded sandstone containing lenses and thin beds of quartz pebbles (up to 5 cm long). the section is 21.2 m thick.

Preservation: replaced with silica

Collection methods: Collection made by Christina Lochman-Balk. The lithologic descriptions of the sections are derived from Lochman-Balk's field notes and Stitt's field reconnaissance.

Primary reference: J. H. Stitt. 1998. Trilobites from the Cedarina dakotaensis zone, lowermost part of the Deadwood Formation, (Marjuman Stage, Upper Cambrian), Black Hills South Dakota. Journal of Paleontology 72(6):1030-1046 [M. Patzkowsky/P. Borkow/J. Alroy] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8197: authorized by Mark Patzkowsky, entered by Phil Borkow on 28.06.2000