Tonalite-leucodiorite plutons

Tonalite-leucodiorite plutons. Includes the Grygla, Red Lake Falls, and other plutons having low magnetic and gravity signatures.
State Minnesota
Name Tonalite-leucodiorite plutons
Geologic age Neoarchean
Lithologic constituents
Major
Igneous > Plutonic > Dioritic (Pluton)leucodiorite
Igneous > Plutonic > Granitic > Tonalite (Pluton)Tonalite-leucodiorite
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 Beltrami - Marshall - Polk - Red Lake