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Dacite and volcanogenic graywacke

Dacite and volcanogenic graywacke - Includes andesite tuff. Occurs in northeastern Wisconsin. Dacite has age of 1866 +/- 39 Ma.
StateMichigan
NameDacite and volcanogenic graywacke
Geologic ageEarly Proterozoic
Original map labelXdvg
CommentsPembine-Wausau terrane. This unit also occurs as a thin sliver in northwestern Michigan, just south of the Niagara Fault.
Primary rock typedacite
Secondary rock typegraywacke
Other rock typesandesite
Lithologic constituents
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 coverageMenominee

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