Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Wallace Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Precambrian | |
| ..Proterozoic | |
| ...Mesoproterozoic | |
| ....Wallace Formation | |
| RT | Idaho |
| Montana | |
| Belt Supergroup | |
| Newland Limestone | |
| SN | In Piegan Group of Belt Supergroup. Thin-bedded bluish and greenish more or less calcareous shales, underlain by rapidly alternating thin beds of argillite, calcareous sandstone, and impure limestone. NE Idaho, and W Montana. |