SEDIS - Thesaurus
Niobrara Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Mesozoic | |
| ...Cretaceous | |
| ....Upper Cretaceous | |
| .....Niobrara Formation | |
| RT | New Mexico |
| Wyoming | |
| Montana | |
| Colorado | |
| Nebraska | |
| North Dakota | |
| Minnesota | |
| Kansas | |
| South Dakota | |
| Colorado Group | |
| Fort Hays Limestone Member | |
| Smoky Hill Chalk Member | |
| SN | In Colorado Group. Includes Fort Hays Limestone Member, Smoky Hill Chalk Member. |
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