Where: Pontotoc County, Oklahoma (34.6° N, 96.6° W: paleocoordinates 22.4° S, 70.2° W)

• outcrop-level geographic resolution

When: Welling Formation, Katian (453.0 - 445.2 Ma)

• Given as Viola; however, Alberstadt's Unit Three is now the Welling formation (C5)

Environment/lithology: deep subtidal; calcareous limestone

Size class: macrofossils

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/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 55505: authorized by Mark Patzkowsky, entered by Zack Krug on 28.10.2005

Creative Commons license: CC BY (attribution)