Also known as Reef 3633

Where: Presidio County, Texas (29.9° N, 104.3° W: paleocoordinates 1.1° N, 34.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Cibolo Formation, Kungurian (279.5 - 272.5 Ma)

• Breccia Zone of Udden

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified limestone

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

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 75861: authorized by Wolfgang Kiessling, entered by Uta Merkel on 02.11.2007