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Mineral Resources On-Line Spatial Data

Ironwood Iron-formation of Menominee Group and Palms Formation of Chocolay Group

Ironwood Iron-formation of Menominee Group and Palms Formation of Chocolay Group - Mapped where units are too thin to show separately on map (Gogebic Range). Palms Formation includes Bad River Dolomite and Sunday Quartzite of Chocolay Group
StateWisconsin
NameIronwood Iron-formation of Menominee Group and Palms Formation of Chocolay Group
Geologic ageEarly Proterozoic
Original map labelXip
Commentsthis unit needs to be added to OFR 97-455 report on web (2 polygons near Mineral Lake, WI) and the two affected polygons retagged (from Xmd). Continental margin assemblage (north of Niagara Fault)
Primary rock typeiron formation
Secondary rock typedolostone (dolomite)
Other rock typesquartzite
Lithologic constituents
Major
Sedimentary > Chemical > Banded-iron-formation (Bed)
Minor
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Sedimentary > Carbonate > Dolostone (Bed)
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 coverageBayfield

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