Chase Group
The Chase Group is a sedimentary rock unit 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. The unit was assigned geologic group rank around 1902.[2]
| Chase Group | |
|---|---|
| Stratigraphic range: Lower Permian | |
| Type | Group |
| Sub-units | Nolans Limestone Odell Shale Winfield Limestone Doyle Shale Barneston Limestone Matfield Shale Wreford Limestone |
| Underlies | Sumner Group |
| Overlies | Council Grove Group |
| Lithology | |
| Primary | Limestone, shale, mudstone |
| Other | Flint, paleosols |
| Location | |
| Region | Kansas with Oklahoma and Nebraska |
| Country | United States |
| Type section | |
| Named for | Chase County, Kansas[1] |
| Named by | C.S. Prosser[1] |
| Year defined | 1895 |
References
- Prosser, C.S., 1895, The classification of the upper Paleozoic rocks of central Kansas: Journal of Geology, v. 3, nos. 6-7, p. 682-705, 764-800.
- "Geologic Unit: Chase". National Geologic Database. Geolex — Significant Publications. United States Geological Survey. Retrieved 2021-11-28.
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