Gateway to the Paleobiology Database
USNM703c, Old Word Ranch, Glass Mountains (Permian of the United States)

Where: Brewster County, Texas (30.4° N, 103.1° W: paleocoordinates 1.1° N, 33.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Road Canyon Formation, Kungurian (279.5 - 272.5 Ma)

• Lower Road Canyon Formation. Lower part of formation contains conodont Mesogondolella idahoensis lamberti, indicating a Kungurian age according to Henderson & Mei (2003).

• group of beds-level stratigraphic resolution

Environment/lithology: slope; black, gray limestone

• Road Canyon Formation records largely slope and basinal deposition.
• Detrital mass of sponges in basal part of dark platy limestone near edge of slope above 703a (basal bioherms). Also includes thin platy spicule-bearing beds on each side of sponge mass.

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 43517: authorized by David Bottjer, entered by Matthew Clapham on 14.08.2004

Creative Commons license: CC BY (attribution)