M. S. M. 103.2. Center of W ½, sec. 2, T21N, R25W (Ordovician of the United States)

Where: Barry County, Missouri (36.7° N, 93.9° W)

• Paleocoordinates: 6.5° N, 111.9° W (Wright 2013)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Blackjack Knob Member (Theodosia Formation), Cassinian (482.3 - 470.0 Ma)

• middle beds

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, gray, argillaceous, cherty/siliceous limestone and lithified, ooidal, gray chert

• Thick to thin-bedded, argillaceous and coarsely crystallin, light gray to buff dolomite. Chert abundant, light to dark gray, oölitic and non oölitic

Size class: macrofossils

Preservation: replaced with silica

Primary reference: J. S. Cullison. 1944. The stratigraphy of some Lower Ordovician formations of the Ozark uplift. University of Missouri School of Mines and Metallurgy Technical Series Bulletin 15(2):1-112 [P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 56511: authorized by Pete Wagner, entered by Pete Wagner on 20.11.2005

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Euomphalina - Raphistomatidae
Ceratopea torta n. sp.
Ceratopea torta n. sp. snail
Tergomya
 Tryblidiida - Tryblidiidae
Proplina elongata n. sp.
Proplina elongata n. sp. Cullison 1944