Granitic intrusion

Granitic intrusion. Includes the Sacred Heart (~2592, 2,603 Ma) and Ortonville granites, the Shannon Lake Granite (~2,674), and other intrusions having low gravity and magnetic signatures.
State Minnesota
Name Granitic intrusion
Geologic age Neoarchean
Lithologic constituents
Major
Igneous > Plutonic > Granitic (Pluton)
Comments Intrusions in all subprovinces of the Superior Province. Part of generally discrete, unfoliated to weakly magmatically foliated or lineated plutons.
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 Becker - Beltrami - Big Stone - Brown - Cass - Chippewa - Clay - Clearwater - Crow Wing - Douglas - Hubbard - Itasca - Kandiyohi - Kittson - Koochiching - Lac qui Parle - Lake - Lake of the Woods - Lincoln - Lyon - Mahnomen - Marshall - Murray - Nicollet - Otter Tail - Polk - Pope - Redwood - Renville - Roseau - Saint Louis - Sibley - Stevens - Swift - Wadena - Wilkin - Wright - Yellow Medicine