SEDIS - Thesaurus
Keweenawan  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Precambrian | |
| ..Proterozoic | |
| ...Keweenawan | |
| NT | Copper Harbor Conglomerate |
| Portage Lake Lava Series | |
| RT | Ontario |
| Wisconsin | |
| Minnesota | |
| Michigan | |
| North Shore Volcanics | |
| SN | Provincial series. Michigan, Minnesota, Wisconsin and Ontario. |
| Keweenawan Rift | |
|---|---|
| BT | North America |
| .Keweenawan Rift | |
| UF | Mid-continent Rift |
| Midcontinent Rift | |
| Midcontinent Rift System | |
| SN | Rift zone during the Proterozoic. Added to Thesaurus in 1989. |
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