Dacite and volcanogenic graywacke

Includes andesite tuff. Occurs in northeastern Wisconsin. Dacite has age of 1866 +/- 39 Ma.
State Wisconsin
Name Dacite and volcanogenic graywacke
Geologic age Early Proterozoic
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanic > Dacite (Flow)dacite, volcanogenic graywacke, andesite tuff
Minor
Sedimentary > Clastic > Sandstone > Graywacke (Tuffaceous)dacite, volcanogenic graywacke, andesite tuff
Igneous > Volcanic > Mafic-volcanic > Andesite (Pyroclastic-tuff)dacite, volcanogenic graywacke, andesite tuff
Comments Pembine-Wausau terrane. This unit also occurs as a thin sliver in northwestern Michigan, just south of the Niagara Fault.
References
NGMDB product
Counties Florence - Marinette