Also known as UW 1672/4A

Where: Albany County, Wyoming (41.3° N, 105.6° W: paleocoordinates 4.3° N, 32.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Casper Formation, Gzhelian (303.7 - 298.9 Ma)

• from an "eight-inch" thick bed "approximately 415 feet above the [pre-Cambrian Sherman] granite... a fauna... from a bed 10 feet lower is Pennsylvanian [so] the fauna discussed here marks the base of the Permian within the Casper formation" Presence of Triticites ventricosus more consistent with Gzhelian age.

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Preservation: replaced with silica

Reposited in the UW

Collection methods: chemical, hydrochloric

• specimens "were freed by etching in hydrochloric acid"

Primary reference: S. L. Pederson. 1954. A Permian (Wolfcampian) fauna of the Casper Formation of southeastern Wyoming . Journal of Paleontology 28(1):17-21 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 81193: authorized by John Alroy, entered by John Alroy on 09.06.2008

Creative Commons license: CC BY (attribution)