Wamp Spring, Supplementary Unit A (Permian of the United States)

Where: Clark County, Nevada (36.6° N, 115.1° W: paleocoordinates 7.8° N, 39.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bird Spring Group, Sakmarian (295.5 - 290.1 Ma)

• bed-level stratigraphic resolution

Environment/lithology: offshore shelf; fine-grained, dolomitic, gray, cherty/siliceous limestone

• 1-2 foot-thick medium-gray weathering, fretted, fine-grained limestone. Nodular chert is noticeably reduced but secondary quartz is important in preserving the abundant fossils. Dolomite is also abundant, filling the shells.

Size class: macrofossils

Preservation: replaced with silica

Collection methods: bulk,

Primary reference: P. C. Mills and R. L. Langenheim Jr. 1987. Wolfcampian brachiopods from the Bird Spring Group, Wamp Spring area, Las Vegas Range, Clark County, Nevada. Journal of Paleontology 61(1):32-55 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 38846: authorized by David Bottjer, entered by Matthew Clapham on 09.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• 2-10 specimens of a rugose coral, 11-25 specimens of "cylindrical" cryptostome bryozoans, single "ribbon "cryptostome bryozoan, 2-10 specimens of marginiferid brachiopods, single bellerophontid gastropod, 11-25 pleurotomarid gastropods, 2-10 cidaroid echinoid spines/plates, 11-25 crinoid columnals and echinoderm fragments
 Productida - Echinoconchidae
 Productida - Productellidae
Elliottella aff. multicostata Cooper and Grant 1975
 Productida - Productidae
 Productida - Rugosochonetidae
Leurosina sinesulca Stehli 1954
 Athyridida - Neoretziidae
Hustedia culcitula Cooper and Grant 1976
 Athyridida - Athyrididae
Composita cf. apheles Cooper and Grant 1976
 Spiriferinida - Spiriferellinidae
? Crenispirifer sp. Stehli 1954
 Spiriferida - Ambocoeliidae
Crurithyris wampensis Mills and Langenheim 1987
 Rhynchonellida - Pontisiidae
Pontisia boodi Mills and Langenheim 1987