Beaver Dam Mountains BM1, Bed 8 (Triassic of the United States)

Where: Washington County, Utah (37.1° N, 113.8° W: paleocoordinates 8.1° N, 39.5° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Virgin Member (Moenkopi Formation), Spathian (251.3 - 247.2 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lithified, shelly/skeletal limestone

• Massive bioclastic limestone, cross-bedded in upper part and probably in middle. Some clasts of siltstone up to 2cm and rhynconellid nests. Some pleurocolumnals. Top is planar surface with truncated bivalves. Abrupt omission surface on top.
• Bedded hard porcellaneous limestone

Size class: macrofossils

Preservation: mold/impression

Collection methods: surface (in situ),

Primary reference: A. J. McGowan, A. B. Smith, and P. D. Taylor. 2009. Faunal diversity, heterogeneity and body size in the Early Triassic: testing post-extinction paradigms in the Virgin Limestone of Utah, USA. Australian Journal of Earth Sciences 56:859-872 [A. McGowan/A. McGowan/M. Clapham]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 62969: authorized by Alistair McGowan, entered by Alistair McGowan on 02.08.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Trochoidea - Colloniidae
Chartronella sp.
Chartronella sp. Cossman 1902 snail
Rhynchonellata
 Terebratulida - Gusarellidae
Protogusarella smithi
Protogusarella smithi Perry and Chatterton 1979
 Rhynchonellida - Norellidae
Piarorhynchella triassica