El Reno Group

Last updated
El Reno Group
Stratigraphic range: Permian
Type Group
Location
Region Oklahoma
Country United States

The El Reno Group is a geologic group in Oklahoma. It preserves fossils dating back to the Permian period. The Chickasha Formation, which is part of this group, contains the geologically most recent Permian continental vertebrates (Roadian) known from North America. [1] These include one of the most recent lepospondyls, [2] a dissorophoid, [3] and some fragmentary fossils of Steppesaurus that Everett C. Olson interpreted as one of the oldest known therapsids, [4] an interpretation that has not been widely accepted.

See also

References

  1. ↑ Laurin, Michel; Hook, Robert W. (2022). "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. 193: 10. doi:10.1051/bsgf/2022007. ISSN   1777-5817.
  2. ↑ Olson, Everett C. (1972). "Diplocaulus parvus n. sp. (Amphibia: Nectridea) from the Chickasha Formation (Permian: Guadalupian) of Oklahoma". Journal of Paleontology. 46 (5): 656–659. ISSN   0022-3360.
  3. ↑ Olson, Everett C. (1972). "Fayella chickashaensis, the Dissorophoidea and the Permian Terrestrial Radiations". Journal of Paleontology. 46 (1): 104–114. ISSN   0022-3360.
  4. ↑ Olson, Everett C. (1962). "Late Permian Terrestrial Vertebrates, U. S. A. and U. S. S. R." . Transactions of the American Philosophical Society. 52 (2): 1–224. doi:10.2307/1005904. ISSN   0065-9746.


Dolomite-Halite-rh02-26a.jpg

This article related to the Permian period is a stub. You can help Wikipedia by expanding it.

This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.