| Speiser Shale | |
|---|---|
| Stratigraphic range: Permian | |
| Type | Formation |
| Unit of | Council Grove Group[1] |
| Lithology | |
| Primary | Shale |
| Other | Mudstone |
| Location | |
| Region | Kansas, Oklahoma, Nebraska |
| Country | United States |
| Type section | |
| Named for | Speiser Township of Richardson County, Nebraska[1] |
The Speiser Shale or Speiser Formation is a geologic formation in Kansas, Oklahoma, and Nebraska dating to the early Permian period.[1]