| Wabaunsee Group | |
|---|---|
| Stratigraphic range: [1] (Virgilian stage)[2] | |
| Type | Group |
| Unit of | Virgilian series |
| Sub-units | |
| Underlies | Admire Group |
| Overlies | Shawnee Group |
| Lithology | |
| Primary | Cyclothems of limestone and shale |
| Other | Mudstone, sand, coal |
| Location | |
| Region | Kansas |
| Country | United States |
| Type section | |
| Named for | Wabaunsee County, Kansas |
| Named by | C.S. Prosser[2] |
| Year defined | 1895 |
The Wabaunsee Group is a Late-Carboniferous geologic group in Kansas, extending into Nebraska, Iowa, Missouri, and Oklahoma.[2][1] The unit is recognized in the subsurface by drillers in Colorado as Wabaunsee Formation.[2]
In locations, some upper members are not present due to a series of erosions that occurred in late-Pennsylvanian time.[3][4]
"The formation covers one-half of Wabaunsee County and, on account of the excellent exposures along nearly every stream in the eastern and northern portions of the county, I would propose that it be called the Wabaunsee formation" (Prosser, 1895, p. 689-690).
The upper portion of the Auburn Shale is the lowest stratigraphic unit exposed in Riley County, and the Pennsylvanian strata above the Dover limestone have almost everywhere been removed by erosion that occurred at the end of Pennsylvanian time or they are now concealed by younger deposits, especially by Recent alluvium.