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  • Geologic map of the 1¬¨‚àû x 2¬¨‚àû Fort Wayne quadrangle, Indiana, Michigan, and Ohio, showing bedrock and unconsolidated deposits
  • Geologic map of the 1¬¨‚àû x 2¬¨‚àû Danville quadrangle, Indiana and Illinois, showing bedrock and unconsolidated deposits