Niobrara Formation
| Use attributes for filter ! | |
| Primary | Chalk |
|---|---|
| Underlies | Pierre Shale |
| Sub-units | Smoky Hill Chalk Member |
| Fort Hays Limestone Member | |
| Regions | North America |
| Other | Shale |
| Date of Reg. | |
| Date of Upd. | |
| ID | 3093673 |
About Niobrara Formation
The Niobrara Formation, also called the Niobrara Chalk, is a geologic formation in North America that was deposited between 87 and 82 million years ago during the Coniacian, Santonian, and Campanian stages of the Late Cretaceous.
