Stettin pluton

Pyroxene syenite, amphibole syenite, tabular syenite, and nepheline syenite. Age approximately 1520 Ma (Sood and others, 1980).
State Wisconsin
Name Stettin pluton
Geologic age Middle Proterozoic
Lithologic constituents
Major
Igneous > Plutonic > Syenitic > Syenite (Stock or pipe)Pyroxene syenite, amphibole syneite, tabluar syenite, and nepheline syenite.
References

Sood and others, 1980, The petrology, geochemistry, and contact relations of the Stettin and Wausau syenite plutons, central Wisconsin: 26th Annual Institute on Lake Superior Geology, Field Trip 3, University of Wisconsin - Eau Claire, 59 p.

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 Marathon