Where: Wyoming (43.5° N, 110.9° W: paleocoordinates 15.5° N, 32.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Franson Member (Park City Formation), Wuchiapingian (259.9 - 254.2 Ma)

• Basal Franson Member. Davydov et al. 2017 dated an ash bed in the upper Meade Peak Member at 260.57 ± 0.07 / 0.14 / 0.31 Ma, indicating that the Meade Peak is as young as uppermost Capitanian.

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone

Size class: macrofossils

Preservation: replaced with silica

Reposited in the AMNH

Primary reference: N. D. Newell and D.W. Boyd. 1995. Pectinoid bivalves of the Permian-Triassic crisis. Bulletin of the American Museum of Natural History 227:1-95 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 82181: authorized by Matthew Clapham, entered by Matthew Clapham on 24.07.2008

Creative Commons license: CC BY (attribution)