Thaynes Limestone

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Thaynes Formation
Stratigraphic range: Triassic
Type Formation
Underlies Ankareh Formation
Overlies Woodside Formation
Lithology
Primary Limestone
Location
Region Montana, Idaho, Wyoming
CountryUnited States
Thaynes Limestone within Green River Basin stratigraphy Gren River Basin Stratigraphic Column.png
Thaynes Limestone within Green River Basin stratigraphy

The Thaynes Formation is a geologic formation in Montana and Idaho, United States. It was recently elevated to group status, as the Thaynes Group. [1]

It preserves fossils dating back to the Triassic period, such as Ammonoidea, Actinopterygii, Actinistia, Conodonta, Gastropoda, Nautiloidea, Ichthyosauria, and others. A diverse fauna known as the Paris biota [2] has been described from the Thaynes Formation.

See also

References

  1. ↑ Lucas, Spencer G.; Krainer, Karl; Milner, Andrew R. C. (2007). "The type section and age of the Timpoweap Member and stratigraphic nomenclature of the Triassic Moenkopi Group in Southwestern Utah". New Mexico Museum of Natural History and Science Bulletin. 40: 109–117.
  2. ↑ Brayard et al. (2017): Unexpected Early Triassic marine ecosystem and the rise of the Modern evolutionary fauna. Science Advances 3 (2):e1602159; doi:10.1126/sciadv.1602159 https://www.science.org/doi/10.1126/sciadv.1602159


(1)Saunders Quarry-1.jpg

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