Chocolay Group, undivided

In Dickinson County, Mich., includes Randville Dolomite, Sturgeon Quartzite, and Fern Creek Formation. In Marquette range, between Marquette Bay and Champion, includes Wewe Slate, Kona Dolomite, Mesnard Quartzite, and Enchantment Lake Formation
State Michigan
Name Chocolay Group, undivided
Geologic age Early Proterozoic
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone (Bed)In Dickinson County, Mich., includes Randville Dolomite, Sturgeon Quartzite, and Fern Creek Formation. In Marquette range, between Marquette Bay and Champion, includes Wewe Slate, Kona Dolomite, Mesnard Quartzite, and Enchantment Lake Formation
Metamorphic > Metasedimentary > Metaclastic > QuartziteIn Dickinson County, Mich., includes Randville Dolomite, Sturgeon Quartzite, and Fern Creek Formation. In Marquette range, between Marquette Bay and Champion, includes Wewe Slate, Kona Dolomite, Mesnard Quartzite, and Enchantment Lake Formation
Minor
Metamorphic > Metasedimentary > Metaclastic > SlateIn Dickinson County, Mich., includes Randville Dolomite, Sturgeon Quartzite, and Fern Creek Formation. In Marquette range, between Marquette Bay and Champion, includes Wewe Slate, Kona Dolomite, Mesnard Quartzite, and Enchantment Lake Formation
Comments Continental margain assemblage (north of Niagara Fault)
References
NGMDB product
Counties Dickinson - Iron - Marquette