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Milladore Volcanic Complex (about 1860 +/- 7 Ma)

Milladore Volcanic Complex (about 1860 +/- 7 Ma) - Succession of poorly exposed interlayered metavolcanic and metasedimentary rocks. Lithic units described in Sims (1990)
StateWisconsin
NameMilladore Volcanic Complex (about 1860 +/- 7 Ma)
Geologic ageEarly Proterozoic
Original map labelXmc
CommentsMarshfield terrane. Sims, P.K., 1990, Geologic map of Precambrian rocks of Eau Claire and Green Bay 1o x 2o quadrangles, central Wisconsin: U.S. Geological Survey Miscellaneous Investigations Series Map I- 1925, scale 1:250,000
Primary rock typemetasedimentary rock
Secondary rock typemetavolcanic rock
Other rock types
Lithologic constituents
Major
Metamorphic > Metaigneous > MetavolcanicSuccession of poorly exposed interlayered metavolcanic and metasedimentary rocks. Lithic units described in Sims (1990)
Metamorphic > MetasedimentarySuccession of poorly exposed interlayered metavolcanic and metasedimentary rocks. Lithic units described in Sims (1990)
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., 1990, Geologic map of Preambrian rocks of Eau Claire and Green Bay 1o x 2o quadrangles, central Wisconsin: U.S. Geological Survey Miscellaneous Investigations Series Map I-1925, scale= 1:250,000.
Geographic coverageMarathon - Portage - Wood

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