| Speiser Shale | |
| Type: | Formation |
| Age: | Permian |
| Prilithology: | Shale |
| Otherlithology: | Mudstone |
| Namedfor: | Speiser Township of Richardson County, Nebraska |
| Region: | Kansas, Oklahoma, Nebraska |
| Country: | United States |
| Unitof: | Council Grove Group |
The Speiser Shale or Speiser Formation is a geologic formation in Kansas, Oklahoma, and Nebraska dating to the early Permian period.[1]