Biotite schist of graywacke protolith, and schist-rich migmatite

Biotite schist of graywacke protolith, and schist-rich migmatite.
State Minnesota
Name Biotite schist of graywacke protolith, and schist-rich migmatite
Geologic age Neoarchean
Lithologic constituents
Major
Metamorphic > Schist > Mica-schist > Biotite-schistBiotite schist of graywacke protolith
Metamorphic > Migmatiteschist-rich migmatite
Comments Foliated to gneissic intrusive complexes and components of batholiths. Part of the metamorphic and intrusive rocks of the Quetico subprovince.
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 Beltrami - Clearwater - Koochiching - Lake - Lake of the Woods - Norman - Pennington - Polk - Red Lake - Saint Louis