Where: Wyoming (42.3° N, 110.6° W: paleocoordinates 14.9° N, 31.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Franson Member (Park City Formation), Wordian (268.0 - 265.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone

Size class: macrofossils

Preservation: mold/impression

Primary reference: K.W. Ciriacks. 1963. Permian and Eotriassic bivalves of the middle Rockies. Bulletin of the American Museum of Natural History 125(1):1-100 [M. Clapham/M. Clapham] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 105273: authorized by Matthew Clapham, entered by Matthew Clapham on 18.02.2011

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)