SEDIS - Thesaurus
Judith River Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Mesozoic | |
| ...Cretaceous | |
| ....Upper Cretaceous | |
| .....Judith River Formation | |
| RT | Alberta |
| Wyoming | |
| Montana | |
| Montana Group | |
| Parkman Sandstone | |
| SN | In Montana Group. Comprises two members: Parkman Sandstone and an upper unnamed member. N, central, S and SE Montana; NW Wyoming; Alberta. |
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