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National Geologic Map Database

General Information

  • Title: Map showing mineral deposits of the midcontinent rift, Lake Superior region, United States and Canada
  • Author(s): Cannon, W.F., and McGervey, T.A.
  • Publishing Organization: U.S. Geological Survey
  • Series and Number: Miscellaneous Field Studies Map MF-2153
  • Publication Date: 1991
  • Map Scale: 1:500,000
  • Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.