Where: Pontotoc County, Oklahoma (34.5° N, 97.0° W: paleocoordinates 22.2° S, 73.3° W)
• outcrop-level geographic resolution
When: Viola Formation, Caradoc (460.9 - 449.5 Ma)
• Unit 2.
Environment/lithology: deep subtidal; gray, sandy, calcareous mudstone
Primary reference: L. P. Alberstadt. 1973. Articulate brachiopods of the Viola Formation (Ordovician) in the ARbuckle Mountains, Oklahoma. Oklahoma Geological Survey Bulletin 117:1-90 [M. Patzkowsky/Z. Krug] more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 55513: authorized by Mark Patzkowsky, entered by Zack Krug on 28.10.2005