Loc. 3: Missouri Highway 21 road cut, 3-4 miles N Potsoi, Washington County (Cambrian of the United States)

Where: Shannon County, Missouri (37.9° N, 90.8° W: paleocoordinates 22.8° S, 86.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

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

• formation-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified chert

• Strata are in pockets of the Ozark Uplift.

Size class: macrofossils

Preservation: 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 49505: authorized by Pete Wagner, entered by Pete Wagner on 18.04.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• The taxonomic list may not include unbublished taxa and stromatolites that are found in the formation/collection but are not described in the literature.
 Tryblidiida - Proplinidae
Potosiplina delorensis1 Stinchcomb and Angeli 2002
 Paleoloricata - Mattheviidae
Hemithecella eminensis2 Stinchcomb and Darrough 1995 chiton