Chase Group
Sedimentary rock unit
From Wikipedia, the free encyclopedia
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]
TypeGroup
Sub-unitsNolans Limestone
Odell Shale
Winfield Limestone
Doyle Shale
Barneston Limestone
Matfield Shale
Wreford Limestone
Odell Shale
Winfield Limestone
Doyle Shale
Barneston Limestone
Matfield Shale
Wreford Limestone
UnderliesSumner Group
OverliesCouncil Grove Group
| 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 |
