National Geologic Map Database
Product Description Page
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Title: Bedrock Topography of Madison County, Illinois
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Author(s): Grimley, D.A., and Phillips, A.C.
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Publishing Organization: Illinois State Geological Survey
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Series and Number: STATEMAP Madison County-BT
- Publication Date: 2022
- Map Scale: 1:62,500
- Cross Section: None
- North Latitude: 39° 0' 0" N (39.0001)
- South Latitude: 38° 39' 18" N (38.6550)
- East Longitude: 89° 35' 43" W (-89.5953)
- West Longitude: 90° 16' 34" W (-90.2760)
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.