Also known as Locality 4 (Romer 1928), faunal Zone 0, Cisco Group, Texas red-beds, redbeds

Where: Archer County, Texas (33.6° N, 98.6° W: paleocoordinates 2.7° S, 30.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Putnam Formation (Cisco Group), Sakmarian (293.5 - 290.1 Ma)

• Details for Faunal Zone 0 of Romer 1928: Plummer and Moore 1921 assign the Putnam Formation to the Cisco Group - boundary is at the top of the Coleman Junction Limestone. "not far below the Cisco-Wichita boundary." Though stated to be Pennsylvanian by Romer, the Putnam F. is now widely regarded as Lower Permian (Shelley 1984).

•the "Putnam Formation" falls between the Moran and Admiral formations (cf., Ross and Ross 1962, Fig. 3), and therefore equates to the Sedwick Formation, Santa Ana Branch Shale, and Coleman Junction Formation, all of which are Sakmarian (Wardlaw 2005, Permophiles)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; red claystone and red, sandy, conglomeratic shale

Size class: macrofossils

Collection methods: Romer (1928) paper is a review of vertebrates from the Texas red-beds with previously unreported (or undetailed) localities.

Primary reference: A. S. Romer. 1928. Vertebrate faunal horizons in the Texas Permo-Carboniferous red beds. University of Texas Bulletin 2801:67-108 [J. Alroy/R. Whatley/W. Clyde]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 28122: authorized by John Alroy, entered by Robin Whatley on 23.01.2003

Creative Commons license: CC BY (attribution)