State | Wisconsin |
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Name | Baraga Group; Michigamme Formation; Mafic to intermediate flows and pyroclastic rocks, including Clarksburg Volcanics member |
Geologic age | Early Proterozoic |
Lithologic constituents | Major
Metamorphic > Metaigneous > MetavolcanicMafic to intermediate flows and pyroclastic rocks [in Michigamme Formation] - poorly exposed. Includes Clarksburg Volcanics member which is mostly mafic to intermediate pyroclastic rocks in Marquette trough, between Marquette Bay and Champion
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Comments | Continental margin assemblage (north of Niagara Fault). ""Xmvl"" - This unit description is combined from the unit descriptions for ""Xmb"" and ""Xmcv"" on the paper map of Sims (1992) |
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.https://pubs.er.usgs.gov/publication/i2185 USGS Geologic Names lexicon found at: http://ngmdb.usgs.gov/Geolex/https://ngmdb.usgs.gov/Geolex/search |
NGMDB product | |
Counties | Vilas |