Wamp Spring, Unit 40 (Permian of the United States)

Where: Clark County, Nevada (36.7° 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)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; cherty/siliceous limestone

• Limestone interbedded with rust-colored chert layers and nodular chert

Size class: macrofossils

Preservation: replaced with silica

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 38845: authorized by David Bottjer, entered by Matthew Clapham on 09.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Single lyssacine hexactinellid root-tuft, bifoliate bryozoans rare, crinoid columnals and echinoderm fragments abundant
Rhynchonellata
 Athyridida - Neoretziidae
Hustedia sp. Hall and Clarke 1893
Hustedia culcitula Cooper and Grant 1976
 Athyridida - Athyrididae
Composita cf. apheles Cooper and Grant 1976