USNM709z, Leonard Mountain, Glass Mountains (Permian of the United States)

Where: Brewster County, Texas (30.3° N, 103.2° W: paleocoordinates 1.4° S, 34.7° W)

• coordinate based on unpublished field data

• outcrop-level geographic resolution

When: Skinner Ranch Formation, Artinskian (290.1 - 279.3 Ma)

• Detached block, Leonardian (Hessian).

• group of beds-level stratigraphic resolution

Environment/lithology: slope; limestone

• Skinner Ranch Fm. is slope to basinal equivalent of platformal Hess Formation.

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

Collection methods: bulk, chemical,

Primary reference: G. A. Cooper and R. E. Grant. 1972. Permian brachiopods of west Texas, I. Smithsonian Contributions to Paleobiology 14:1-231 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 43607: authorized by David Bottjer, entered by Matthew Clapham on 15.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• A variety of papers list the brachiopods, nearly all gastropods, most bivalves (except primarily Paleotaxodonts), trilobites, chitons, siliceous sponges, rugose corals (only from Gaptank and Asselian/Sakmarian formations).
Rhynchonellata
 Orthida - Schizophoriidae
"Acosarina dorsisulcata" = Acosarina minuta
"Acosarina dorsisulcata" = Acosarina minuta Abich 1878
Strophomenata
 Productida - Productellidae
 Productida - Aulostegidae
Chonosteges variabilis Cooper and Grant 1975
 Productida - Scacchinellidae
Scacchinella titan Cooper and Grant 1975