PBDB Collection

BC-6 (Chickasha Formation) (Permian to of the United States)

Also known as Chickasha Tongue; Flowerpot Shale; Flowerpot Formation

Where: Blaine County, Oklahoma (36.0° N, 98.4° W: paleocoordinates 4.6° N, 26.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Chickasha Formation (El Reno Group), Roadian to Roadian (272.3 - 264.3 Ma)

• "All the deposits are in that part of the Chickasha Formation delineated by Fay (1962) as the Chickasha Tongue within the Flowerpot Formation. The tongue contains four mapped beds, numbered consecutively from 1 (lowest) to 4 (highest)." "The [vertebrate-bearing] beds lie mainly between beds 2 and 3 of the Chickasha Tongue" mostly in section 35.

•Minimum age originally entered as >> Capitanian <<. These beds, however, are likely to be older (see, e.g., Reisz & Laurin, 2002, 114(9)).

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; concretionary, red shale and green sandstone

• "The vertebrate fauna in the Chickasha deposits lived on a delta marginal to the sea in which the deposits of the El Reno Group were formed."

• "Most of the vertebrates have come from the rather limited exposures in section 35. They were in siltstone and green sandstone marginal to channel deposits." The single specimen of Nannospondylus stewarti, n. g., n. sp. "column was encased in a red nodule, which in turn was covered by sandy red shale."

Size class: macrofossils

Reposited in the FMNH

Primary reference: E. C. Olson. 1965. New Permian vertebrates from the Chickasha Formation in Oklahoma. Circular Oklahoma Geological Survey 70:1-70 [C. Sidor/C. Sidor/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27414: authorized by John Alroy, entered by Robin Whatley on 05.12.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Osteichthyes
Caseasauria - Caseidae	Cotylorhynchus bransoni, Angelosaurus romeri Cotylorhynchus bransoni Olson and Barghusen 1962 synapsid CNHM UR 972 (caudal vertebra) Angelosaurus romeri Olson and Barghusen 1962 synapsid CNHM UR 977 (femur)
Amphibia
Temnospondyli - Trimerorhachidae	Nannospondylus stewarti n. gen. n. sp. Nannospondylus stewarti n. gen. n. sp. Olson 1965 tetrapod CNHM UR 1002 (type)