University of Illinois Campus Deep Direct-Use Feasibility Study - Bedrock Geology ArcGIS Layers
Bedrock Geology of Champaign County, Illinois, map layers (shapefiles).  
Layers included: 
1) Champaign County bedrock units. 
2) Champaign County bedrock surface contours. Contour interval of 25 feet.
3) Colchester coal surface contours. Contour interval of 50 feet.
4) Kimmswick Limestone top contours, in the …