Granite, reddish, variably porphyritic, massive; includes the St. Cloud Red (~1,779 Ma), Foley (~1,774, 1,779 Ma), Pierz (~1,779 Ma), and Pease granites, and Richmond charnockitic granite (~1,772 Ma). An unnamed granite in south-central Minnesota is slightly older at ~1,792 Ma.
State Minnesota
Name Granite
Geologic age Paleoproterozoic
Lithologic constituents
Igneous > Plutonic > Granitic > Granite (Batholith)reddish, variably porphyritic, massive
Comments Part of the East-central Minnesota batholith. Part of the Geon 17 post-tectonic (post-Penokean orogeny) intrusions related to the Yavapai orogeny.

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 Benton - Kanabec - Kandiyohi - McLeod - Meeker - Mille Lacs - Morrison - Sherburne - Sibley - Stearns - Wright