Wolf River batholith; Hager Formation; Quartz porphyry member

Contains 30-45 percent resorbed quartz phenocrysts (3-4 mm) and less abundant alkali feldspar and plagioclase phenocrysts (4-5 mm) in a fine-grained matrix of quartz, two feldspars, biotite, and hornblende
State Wisconsin
Name Wolf River batholith; Hager Formation; Quartz porphyry member
Geologic age Middle Proterozoic
Lithologic constituents
Major
Igneous > Plutonic > Granitic > GraniteContains 30-45 percent resorbed quartz phenocrysts (3-4 mm) and less abundant alkali feldspar and plagioclase phenocrysts (4-5 mm) in a fine-grained matrix of quartz, two feldspars, biotite, and hornblende
References
NGMDB product
Counties Oconto