Ninth Street Road Casper Formation site (Carboniferous of the United States)

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

• "lavender silicified limestone at the top of a ten foot bed of massive, brown limestone bearing Triticites"

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)

Taxonomic list

 Fusulinoidea - Schwagerinidae
Triticites ventricosus Meek and Hayden 1858
Brachiopoda indet. Cuvier 1805
 Productida - Echinoconchidae
"Juresania nebrascensis" = Parajuresania nebrascensis
"Juresania nebrascensis" = Parajuresania nebrascensis Owen 1852
 Productida - Productellidae
 Productida - Productidae
"Dictyoclostus americanus" = Reticulatia americana
"Dictyoclostus americanus" = Reticulatia americana Dunbar and Condra 1932
 Productida - Chonetidae
"Chonetes" sp. Fischer de Waldheim 1830
 Orthotetida - Meekellidae
Meekella attenuata Girty 1909
 Athyridida - Athyrididae
Composita ovata Mather 1915
 Spiriferida - Trigonotretidae
Neospirifer bakeri King 1931
N. bakeri wyomingensis type
 Rhynchonellida - Wellerellidae
Wellerella sp. Dunbar and Condra 1932