WC X 20, Deadwood Form., Black Hills, South Dakota - Stitt and Straatmann 1997 (Cambrian of the United States)

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

• local area-level geographic resolution

When: Ellipsocephaloides zone, Deadwood Formation, Franconian (497.0 - 485.4 Ma)

• Collection numbers represent exact footage above the base of the section. The X in the collection name indicates that the sample was not collected in situ but had not moved very far, and the footage is approximate.

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified shale and lithified siltstone

• The Black Hills is a domal basement uplift formed during the Laramide Orogeny.
• interbedded sequence of thick fissile shale, laminated limy siltstones, red siltstones, and sandstones.

Collection methods: Collected by Christina Lochman-Balk and her students. Only trilobites are included in the collection.

Primary reference: J. H. Stitt and W. M. Straatmann. 1997. Trilobites from the upper part of the Deadwood Formation (Upper Franconian and Trempealeauan stages, Upper Cambrain), Black Hills, South Dakota. Journal of Paleontology 71(1):86-102 [M. Patzkowsky/P. Borkow/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 9750: authorized by Mark Patzkowsky, entered by Phil Borkow on 18.01.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

• Abundances are lsited as cranidia-pygidia-librigenae-hypostomes (C-P-L-H), for polymeroid trilobites, cephala-pygidia (C-P) for agnostid trilobites, and number of valves for brachiopods.
Show authors, comments, and common names
Artiopoda
 Agnostida - Diplagnostidae
"Pseudagnostus josepha" = Pseudagnostus josephus
"Pseudagnostus josepha" = Pseudagnostus josephus Hall 1863
(0-1)