Pease River Group Explained
The Pease River Group is a geologic group in Texas Red Beds. It preserves fossils dating back to the Permian period, including some of the geologically most recent continental and coastal vertebrates of the Permian in North America. These are preserved in the San Angelo Formation, which is probably of early Roadian age.[1] [2] They include several fragmentary fossils that Everett C. Olson interpreted as the earliest therapsids,[3] [4] an interpretation that has not been widely accepted.[5]
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References
Notes and References
- Smith . Gary E. . Depositional systems, San Angelo Formation (Permian), north Texas--facies control of red-bed copper mineralization . Report of Investigations, Bureau of economic geology . 1974 . 80 . 73 . 10.26153/tsw/4807 . en.
- Laurin . Michel . Hook . Robert W. . The age of North America’s youngest Paleozoic continental vertebrates: a review of data from the Middle Permian Pease River (Texas) and El Reno (Oklahoma) Groups . BSGF - Earth Sciences Bulletin . 2022 . 193 . 10 . 10.1051/bsgf/2022007 . 1777-5817.
- Olson . Everett C. . Late Permian Terrestrial Vertebrates, U. S. A. and U. S. S. R. . Transactions of the American Philosophical Society . 1962 . 52 . 2 . 1–224 . 10.2307/1005904 . 0065-9746.
- Olson . Everett C. . Beerbower . James R. . The San Angelo Formation, Permian of Texas, and Its Vertebrates . The Journal of Geology . 1953 . 61 . 5 . 389–423 . 0022-1376.
- Olroyd . Savannah L. . Sidor . Christian A. . A review of the Guadalupian (middle Permian) global tetrapod fossil record . Earth-Science Reviews . 1 August 2017 . 171 . 583–597 . 10.1016/j.earscirev.2017.07.001 . 0012-8252.
