| State | Minnesota |
|---|---|
| Name | Granitic orthogneiss and migmatite |
| Geologic age | Mesoarchean to Paleoarchean |
| Lithologic constituents | Major
Metamorphic > Metaigneous > OrthogneissGranitic orthogneiss
Metamorphic > Migmatite
|
| Comments | Part of the Minnesota River Valley subprovince (~3,100 to 3,500 Ma) of west-central and southwestern Minnesota; which includes the Montevideo, Morton, and related gneisses. |
| References | Jirsa, Mark A., Boerboom, Terrence J., Chandler, Val W., Mossler, John H., Runkel, Anthony C., and Setterholm, Dale R., 2011, S-21 Geologic Map of Minnesota-Bedrock Geology; Minnesota Geological Survey, State Map Series S-21. Scale 1:500,000. |
| NGMDB product | |
| Counties | Big Stone - Brown - Chippewa - Kandiyohi - Lac qui Parle - Lyon - McLeod - Meeker - Morrison - Murray - Nicollet - Pope - Redwood - Renville - Sibley - Stearns - Stevens - Swift - Todd - Yellow Medicine |