Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Portage Lake Lava Series  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Precambrian | |
| ..Proterozoic | |
| ...Keweenawan | |
| ....Portage Lake Lava Series | |
| RT | Michigan |
| SN | Tops of conglomerate beds used for stratigraphic reference include: Saint Louis Conglomerate, The Old Colony and Wolverine sandstones, and the Kingston, Calumet and Hecla, Houghton, Allouez, Pewabic West, and Hancock conglomerates. Upper Peninsula of Mich |