Roca Formation (United States)
Geologic formation in Oklahoma, Nebraska, and Kansas
From Wikipedia, the free encyclopedia
The Roca Formation (or Roca Shale) is an early Permian geologic formation (Wolfcampian) with its exposure running north and south through Kansas and extending into Nebraska and Oklahoma, notably comprising varicolored black, brown, gray, green, red, and blue shales, mudstones, and limestone, some of which representing Permian paleosols.[1][2]
| Roca Formation | |
|---|---|
| Stratigraphic range: early Permian | |
Multicolored Roca Shale, well-exposed along Seth Child Road in Manhattan, Kansas, marked by the Howe limestone below and the Sallyards limestone and Legion shale above. | |
| Type | Formation |
| Lithology | |
| Primary | Shale and mudstone |
| Other | Limestone |
| Location | |
| Region | Midcontinent (Nebraska, Kansas, Oklahoma)[1] |
| Country | United States |
| Type section | |
| Named for | Roca, Nebraska[1] |
