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Granite-tonalite

Granite-tonalite - 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
StateWisconsin
NameGranite-tonalite
Geologic ageEarly Proterozoic
Original map labelXgg
CommentsPembine-Wausau terrane
Primary rock typegranite
Secondary rock typetonalite
Other rock typesgneiss
Lithologic constituents
Major
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
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
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
Map 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
Unit 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
Geographic coverageChippewa - Florence - Forest - Marinette - Oneida - Price - Rusk - Sawyer - Taylor - Vilas

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