Notes: | Blue line print. Plot composed by: M. Bargh. Updated: January 1989. Date of plot: January 3, 1990. "These data were compiled and digitized at a scale of 1:62,500. Locations of some features may be offset by 500 feet or more due to errors in the original source maps, the compilation process, digitizing, or a combination of these factors. The Illinois State Geological Survey does not guarantee the validity or accuracy of these data." Indexed by accompanying text. Inset: Township 30 North, Range 3 East.
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