Gray granodiorite to granite intrusions

Gray granodiorite to granite intrusions. Includes the Reformatory (~1,783 Ma), Freedhem (~1,775, 1,776 Ma), Isle (~1,779 Ma), and Warman (~1,787 Ma) intrusions.
State Minnesota
Name Gray granodiorite to granite intrusions
Geologic age Paleoproterozoic
Lithologic constituents
Igneous > Plutonic > Granitic > Granodiorite (Batholith)granodiorite to granite
Igneous > Plutonic > Granitic > Granite (Batholith)granodiorite to granite
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 Aitkin - Benton - Kanabec - Kandiyohi - McLeod - Meeker - Mille Lacs - Morrison - Nicollet - Pope - Sherburne - Stearns - Wright