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Baraga Group; Michigamme Formation; Mafic to intermediate flows and pyroclastic rocks, including Clarksburg Volcanics member

Baraga Group; Michigamme Formation; Mafic to intermediate flows and pyroclastic rocks, including Clarksburg Volcanics member - Poorly exposed. Includes Clarksburg Volcanics member which is mostly mafic to intermediate pyroclastic rocks in Marquette trough, between Marquette Bay and Champion
StateMichigan
NameBaraga Group; Michigamme Formation; Mafic to intermediate flows and pyroclastic rocks, including Clarksburg Volcanics member
Geologic ageEarly Proterozoic
Original map labelXmvl
CommentsContinental 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)
Primary rock typemetavolcanic rock
Secondary rock type
Other rock types
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
Unit 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
Geographic coverageGogebic - Iron - Marquette

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=MIXmvl;0
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