Lake Frederick site OMNH V247; upper sandstone, clay layer (Permian of the United States)

Where: Tillman County, Oklahoma (34.5° N, 98.9° W: paleocoordinates 2.8° N, 28.1° W)

• coordinate based on nearby landmark

When: Garber Sandstone Formation (Sumner Group), Permian (298.9 - 251.9 Ma)

• upper part of Garber Sandstone Formation; early Permian

Environment/lithology: terrestrial; sandstone and claystone

• deposited in fluvial and lacustrine environments in a coastal plain
• 49-64 m of reddish-brown, coarse-grained sandstone, reddish-brown to grayish mudstone conglomerates, and gray claystone

•15-20 cm thick, devided into upper and lower layers by 1-2 cm of silty clay

Size classes: macrofossils, mesofossils

Primary reference: J. Zidek, G.D. Johnson, W. May and A. Claborn. 2003. New Specimens of Xenacanth and Hybodont Sharks (Elasmobranchii: Xenacanthida and Hybodontoidea) from the Lower Permian of Southwestern Oklahoma. Oklahoma Geology Notes 63(4):136-147 [B. Seuss/B. Seuss/B. Seuss]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 221389: authorized by Barbara Seuss, entered by Barbara Seuss on 02.08.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Acanthoidea indet.
Acanthoidea indet.
spine, in isolated piece of sandstone
Reptilia
 Eureptilia - Captorhinidae
Captorhinus aguti
Captorhinus aguti Cope 1882 eureptile
Amphibia
 Nectridea - Diplocaulidae
Diplocaulus sp.
Diplocaulus sp. Cope 1877 tetrapod
 Temnospondyli - Trimerorhachidae
Trimerorhachis sp.
Trimerorhachis sp. Cope 1878 tetrapod
Chondrichthyes
 Hybodontiformes -
Hybodontoidea indet.
Hybodontoidea indet. Agassiz 1834 elasmobranch
teeth