Saganaga Tonalite

(~2,690 Ma) - Tonalite to granodiorite; typically contains large quartz phenocrysts and granodioritic to dioritic autoliths.
State Minnesota
Name Saganaga Tonalite
Geologic age Neoarchean
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granodiorite (Pluton)typically contains large quartz phenocrysts and granodioritic to dioritic autoliths
Igneous > Plutonic > Granitic > Tonalite (Pluton)tonalite to granodiorite
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 Cook