Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Ludlow Member  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Paleogene | |
| ....Paleocene | |
| .....Ludlow Member | |
| RT | Montana |
| North Dakota | |
| South Dakota | |
| Fort Union Formation | |
| SN | In Fort Union Formation. NW and N South Dakota, NE Montana and SW North Dakota. Added to Thesaurus in 1989. |