Amphibolitic to dioritic gneiss

Amphibolitic to dioritic gneiss.
State Minnesota
Name Amphibolitic to dioritic gneiss
Geologic age Mesoarchean to Paleoarchean
Lithologic constituents
Metamorphic > Metaigneous > Orthogneiss (Amphibolite)amphibolitic to dioritic gneiss
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.

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 Chippewa - Lac qui Parle - Nobles - Pope - Stearns - Swift - Yellow Medicine