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This map portrays the geology of Early Proterozoic rocks deposited along the southern margin of the Archean Superior craton during the Penokean orogenic cycle in northern Michigan and Wisconsin.
    map background search result map search result map Geology and mineral deposits of the Keweenaw Peninsula and vicinity, Michigan Digital bedrock geologic map of the Ashland and northern part of the Ironwood 30' x 60' quadrangles, Wisconsin and Michigan Map showing areas with potential for talc deposits in the Gravelly, Greenhorn, and Ruby ranges and the Henrys Lake Mountains of southwestern Montana Preliminary digital geologic map of the Penokean (early Proterozoic) continental margin in northern Michigan and Wisconsin A compilation of spatial digital databases for selected U.S. Geological Survey nonfuel mineral resource assessments for parts of Idaho and Montana Map showing areas with potential for talc deposits in the Gravelly, Greenhorn, and Ruby ranges and the Henrys Lake Mountains of southwestern Montana Geology and mineral deposits of the Keweenaw Peninsula and vicinity, Michigan Preliminary digital geologic map of the Penokean (early Proterozoic) continental margin in northern Michigan and Wisconsin A compilation of spatial digital databases for selected U.S. Geological Survey nonfuel mineral resource assessments for parts of Idaho and Montana