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National Geologic Map Database

General Information

  • Title: Geologic map of the Union School quadrangle, Dawson and Prairie Counties, Montana
  • Author(s): Colton, R.B., McGraw, J.P., and Durst, S.L.
  • Publishing Organization: U.S. Geological Survey
  • Series and Number: Open-File Report OF-88-617
  • Publication Date: 1994
  • Map Scale: 1:24,000
  • Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.