State | Wisconsin |
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Name | Athelstane Quartz Monzonite |
Geologic age | Early Proterozoic |
Lithologic constituents | Major
Igneous > Plutonic > Granitic > Granodiorite (Stock or pipe)Pink, coarse-grained granite to granodiorite containing nearly equal amounts of microcline microperthite, plagioclase, and quartz and 5-10 percent biotite and (or) hornblende. Mafic minerals are interstitial and give a clotty appearance. (1836 +- 15 Ma)
Igneous > Plutonic > Granitic > Granite (Stock or pipe)Pink, coarse-grained granite to granodiorite containing nearly equal amounts of microcline microperthite, plagioclase, and quartz and 5-10 percent biotite and (or) hornblende. Mafic minerals are interstitial and give a clotty appearance. (1836 +- 15 Ma)
|
Comments | Pembine-Wausau terrane. This unit mostly occurs in Wisconsin but also occurs as a thin sliver in nortwestern Michigan. |
References | |
NGMDB product | |
Counties | Marinette |