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- The Cody Shale is a Late Cretaceous geologic formation. It is mapped in Wyoming, Idaho, and Montana. The formation is described by W.G. Pierce as follows: upper part is buff, sandy shale and thinly laminated buff sandstone; lower part is dark gray, thin-bedded marine shale. The formation is divided into many members that vary regionally. Alphabetically:
* Ardmore Bentonite Beds (WY)
* Belle Fourche Member (MT, WY)
* Carlile Member (MT, WY)
* Claggett Member (MT, WY)
* Eldridge Creek Member (MT)
* Gammon Ferruginous Member (MT, WY)
* Greenhorn Calcareous Member (MT)
* Niobrara Member (MT, WY)
* Sage Breaks Member (WY)
* Shannon Sandstone Member (MT, WY)
* Steele Member (WY)
* Sussex Sandstone Member (WY)
* Telegraph Creek Member (MT, WY)
* Wallace Creek Tongue (WY) Certain members rise to formation rank in other areas; for example, the Greenhorn is classified as a formation in a number of states, particularly in Colorado and Kansas. (en)
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- 2481 (xsd:nonNegativeInteger)
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- Wyoming, Idaho, Montana (en)
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- Montana folded belt province, Central Montana uplift, Big Horn basin, Powder River basin, Wind River basin (en)
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- The Cody Shale is a Late Cretaceous geologic formation. It is mapped in Wyoming, Idaho, and Montana. The formation is described by W.G. Pierce as follows: upper part is buff, sandy shale and thinly laminated buff sandstone; lower part is dark gray, thin-bedded marine shale. The formation is divided into many members that vary regionally. Alphabetically: Certain members rise to formation rank in other areas; for example, the Greenhorn is classified as a formation in a number of states, particularly in Colorado and Kansas. (en)
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