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National Geologic Map Database

General Information

  • Title: Bedrock geology of Boone and Winnebago Counties, Illinois
  • Author(s): McGarry, C.S.
  • Publishing Organization: Illinois State Geological Survey
  • Series and Number: Open File Series OFS 2000-3
  • Publication Date: 2000
  • Map Scale: 1:100,000
  • Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.