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Geologic Unit: Soudan
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  • Usage in publication:
    • Soudan Iron-formation Member*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Lake Superior region
Publication:

Sims, P.K., 1976, Early Precambrian tectonic-igneous evolution in the Vermilion district, northeastern Minnesota: Geological Society of America Bulletin, v. 87, no. 3, p. 379-389.


Summary:

Is middle member of Ely Greenstone in Vermilion district of northern MI in Lake Superior region. Is approximately 150 m thick and consists of iron-formation and intermediate-mafic pyroclastic rocks. Is Precambrian W in age. Generalized geologic map.

Source: GNU records (USGS DDS-6; Denver GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

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