Ironton-Galesville

The Ironton-Galesville consists of clean, medium- to coarse-grained, partly dolomitic sandstone and has the most consistently high permeability values of all bedrock units in northeastern Illinois. It is the most important bedrock aquifer in the county, and municipal wells can obtain relatively large water supplies with high flow rates.

Left is three-dimensional representation of the thickness of the Ironton-Galena Interval.