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
State Wisconsin
Name Ironwood Iron-formation of Menominee Group and Palms Formation of Chocolay Group
Geologic age Early Proterozoic
Lithologic constituents
Major
Sedimentary > Chemical > Banded-iron-formation (Bed)
Minor
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Sedimentary > Carbonate > Dolostone (Bed)
Comments this 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)
References
NGMDB product
Counties Bayfield