The Sumner Group is a sedimentary geologic group of Lower Permian age. It is defined in east-central Kansas and extends into Oklahoma and Nebraska as well as the Colorado subsurface where it is undivided.[2]
Sumner Group | |
---|---|
Stratigraphic range: Lower Permian | |
Type | Group |
Sub-units | Stone Corral Formation, Ninnescah Shale, Wellington Formation |
Underlies | Nippewalla Group |
Overlies | Chase Group |
Lithology | |
Primary | Shale, dolomite |
Other | Salt, anhydrite, mudstone |
Location | |
Region | Kansas |
Country | United States |
Type section | |
Named for | Sumner County, Kansas[1] |
Named by | F.W. Cragin[1] |
Year defined | 1896 |
See also
References
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