Locality V. bluff along West Frok of Black River (Cambrian of the United States)

Where: Reynolds County, Missouri (37.0° N, 91.0° W: paleocoordinates 22.9° S, 87.4° W)

• outcrop-level geographic resolution

When: Potosi Formation, Trempealeauan (501.0 - 485.4 Ma)

• The dolomite in which the fossils occur may or may not be in place stratigraphically. So, a rating of A through F indicates stratigraphic reliability with A = no question as to stratigraphic position of horizon and F = residual material of different ages. Reliability Index A

• formation-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified, cherty/siliceous dolomite

• Strata are in pockets of the Ozark Uplift.
• thick, cherty dolomite with digitate stromatolites

Size classes: macrofossils, mesofossils

Preservation: original calcite, replaced with silica

Primary reference: B. L. Stinchcomb. 1986. New Monoplacophora (Mollusca) from Late Cambrian and Early Ordovician of Missouri. Journal of Paleontology 60(3):606-626 [M. Patzkowsky/P. Borkow/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8904: authorized by Mark Patzkowsky, entered by Phil Borkow on 06.09.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• Taxonomic list may not include some hyperstrophic gastropods, undescribed trilobites and stromatolites which are found in the formation but not collected.
 Tryblidiida - Tryblidiidae
Proplina inflatus n. sp. Stinchcomb 1986