Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Lance Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Mesozoic | |
| ...Cretaceous | |
| ....Upper Cretaceous | |
| .....Lance Formation | |
| RT | Wyoming |
| Montana | |
| Colorado | |
| North Dakota | |
| South Dakota | |
| SN | Includes Colgate Sandstone Member, Cannonball Marine Member, Ludlow Lignitic Member, Tullock Member, Hell Creek Member, Torrington Member, and Ilo Ridge Member. Montana, W North Dakota, W South Dakota, and Wyoming. |