| RED BEDS |
| GRAND RIVER FORMATION |
| SAGINAW FORMATION |
| BAYPORT LIMESTONE |
| MICHIGAN FORMATION |
| MARSHALL FORMATION |
| COLDWATER SHALE |
| SUNBURY SHALE |
| BEREA SANDSTONE & BEDFORD |
| BEDFORD SHALE |
| ELLSWORTH SHALE |
| ANTRIM SHALE |
| TRAVERSE GROUP |
| BELL SHALE |
| DUNDEE LIMESTONE |
| DETROIT RIVER GROUP |
| SYLVANIA SANDSTONE |
| MACKINAC BRECCIA |
| BOIS BLANC FORMATION |
| GARDEN ISLAND FORMATION |
| BASS ISLAND GROUP |
| SALINA GROUP |
| SAINT IGNACE DOLOMITE |
| POINT AUX CHENES SHALE |
| ENGADINE GROUP |
| MANISTIQUE GROUP |
| BURNT BLUFF GROUP |
| CABOT HEAD SHALE |
| MANITOULIN DOLOMITE |
| QUEENSTON SHALE |
| BIG HILL DOLOMITE |
| STONINGTON FORMATION |
| UTICA SHALE MEMBER |
| COLLINGWOOD SHALE MEMBER |
| TRENTON GROUP |
| BLACK RIVER GROUP |
| PRAIRIE DU CHIEN GROUP |
| TREMPEALEAU FORMATION |
| MUNISING FORMATION |
| JACOBSVILLE SANDSTONE |
| FREDA SANDSTONE |
| NONESUCH FORMATION |
|
| COPPER HARBOR CONGLOMERATE |
| OAK BLUFF FORMATION |
| PORTAGE LAKE VOLCANICS |
|
| SIEMENS CREEK FORMATION |
| INTRUSIVE |
| QUINNESEC FORMATION |
| PAINT RIVER GROUP |
|
| RIVERTON IRON FORMATION |
|
| BIJIKI IRON FORMATION |
|
| NEGAUNEE IRON FORMATION |
|
| IRONWOOD IRON FORMATION |
| DUNN CREEK FORMATION |
| BADWATER GREENSTONE |
| MICHIGAMME FORMATION |
| GOODRICH QUARTZITE |
|
| HEMLOCK FORMATION |
| MENOMINEE & CHOCOLAY GROUPS |
| EMPEROR VULCANIC COMPLEX |
|
| SIAMO SLATE & AJIBIK QUARTZITE |
| PALMS FORMATION |
|
| CHOCOLAY GROUP |
| RANDVILLE DOLOMITE |
| ARCHEAN ULTRAMAFIC |
| ARCHEAN GRANITE & GNEISSIC |
| ARCHEAN VOLCANIC & SEDIMENTARY |
