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Granite-tonalite

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Gray to pinkish-gray, medium-grained, generally equigranular granite to tonalite and granitoid gneiss; locally includes diorite. Intrudes older metavolcanic rocks. Zircon ages range from 1852 +/- 15 to 1862 +/- 5 Ma
State Wisconsin
Name Granite-tonalite
Geologic age Early Proterozoic
Lithologic constituents
Major
Igneous > Plutonic > Granitic > TonaliteGray to pinkish-gray, medium-grained, generally equigranular granite to tonalite and granitoid gneiss; locally includes diorite. Intrudes older metavolcanic rocks. Zircon ages range from 1852 +- 15 to 1862 +- 5 Ma
Igneous > Plutonic > Granitic > GraniteGray to pinkish-gray, medium-grained, generally equigranular granite to tonalite and granitoid gneiss; locally includes diorite. Intrudes older metavolcanic rocks. Zircon ages range from 1852 +- 15 to 1862 +- 5 Ma
Metamorphic > GneissGray to pinkish-gray, medium-grained, generally equigranular granite to tonalite and granitoid gneiss; locally includes diorite. Intrudes older metavolcanic rocks. Zircon ages range from 1852 +- 15 to 1862 +- 5 Ma
Minor
Igneous > Plutonic > Dioritic > DioriteGray to pinkish-gray, medium-grained, generally equigranular granite to tonalite and granitoid gneiss; locally includes diorite. Intrudes older metavolcanic rocks. Zircon ages range from 1852 +- 15 to 1862 +- 5 Ma
Comments Pembine-Wausau terrane
References

Sims, P.K., 1992, Geologic map of Precambrian rocks, southern Lake Superior region, Wisconsin and northern Michigan: U.S. Geological Survey Miscellaneous Investigations Map I-2185, scale 1:500,000.

https://pubs.er.usgs.gov/publication/i2185
NGMDB product
Counties Chippewa - Florence - Forest - Marinette - Oneida - Price - Rusk - Sawyer - Taylor - Vilas