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Granodiorite-tonalite

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Gray, medium-grained intrusive rocks, including intrusion breccias. Exposed in central Wisconsin. Zircon ages range from 1837 to 1847 Ma
State Wisconsin
Name Granodiorite-tonalite
Geologic age Early Proterozoic
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granodiorite (Stock or pipe)Gray, medium-grained intrusive rocks, including intrusion breccias.
Igneous > Plutonic > Granitic > Tonalite (Stock or pipe)Gray, medium-grained intrusive rocks, including intrusion breccias.
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 Langlade - Lincoln - Marathon - Portage