Where: Culberson County, Texas (31.7° N, 104.2° W: paleocoordinates 1.1° N, 34.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Virginia Draw Member (Rustler Formation), Changhsingian (254.2 - 252.2 Ma)

• Early Changhsingian based on conodonts.

• member-level stratigraphic resolution

Environment/lithology: marine; dolomite and siltstone

Size class: macrofossils

Preservation: original calcite, replaced with other

Collection methods: chemical, hydrochloric,

• Anhydrite-replaced fossils etched by hydrochloric acid.

Primary reference: J. C. Walter. 1953. Paleontology of Rustler Formation, Culberson County, Texas. Journal of Paleontology 27(5):679-702 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 50021: authorized by David Bottjer, entered by Matthew Clapham on 04.05.2005

Creative Commons license: CC BY (attribution)