Granite-rich migmatite

Granite-rich migmatite. Contains neosome of variably magnetic biotite granite similar to the Lac La Croix Granite, and paleosome of tonalite to granodiorite gneiss and schist.
State Minnesota
Name Granite-rich migmatite
Geologic age Neoarchean
Lithologic constituents
Metamorphic > MigmatiteGranite-rich migmatite
Comments Foliated to gneissic intrusive complexes and components of batholiths. Part of the metamorphic and intrusive rocks of the Quetico subprovince.

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 - Koochiching - Lake - Saint Louis