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National Geologic Map Database

General Information

  • Title: Preliminary geologic map, District of Columbia
  • Author(s): Froelich, A.J., and Hack, J.T.
  • Publishing Organization: U.S. Geological Survey
  • Series and Number: Open-File Report OF-75-537
  • Publication Date: 1975
  • 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.