Menominee Group; unexposed magnetic unit

Surrounds gneiss domes in Gogebic County, Mich. and Vilas County, Wisc., and occurs in north-central Dickinson County. Probably correlative with part of Blair Creek Formation (unit Xbc). Previously correlated with uppermost unit of Blair Creek Formation (Sims and others, 1984).
State Wisconsin
Name Menominee Group; unexposed magnetic unit
Geologic age Early Proterozoic
Lithologic constituents
Sedimentary > Chemical > Banded-iron-formation (Bed)
Metamorphic > Metasedimentary > Metaclastic > Slate
Comments Continental margin assemblage (north of Niagara Fault). Sims and others, 1984, Geology, geochemistry, and age of Archean and Early Proterozoic rocks in the Marenisco-Watersmeet area, northern Michigan: U.S. Geological Survey Professional Paper 1292-A, p. A1-A41
NGMDB product
Counties Iron - Vilas