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Lake County | Quaternary | Maquoketa Formation | Silurian | Galena-Platteville Interval | Ancell Formation |
Ironton-Galesville | Eau Claire Formation | Mt. Simon Sandstone | Cross Sections


Top of the Mt. Simon Sandstone in Lake County, Illinois

Map of Lake County showing the top of the Mt. Simon Sandstone

Mt. Simon Sandstone

The Mt. Simon is the deepest aquifer in the county and consists of nearly 2,000 feet of fine- to coarse-grained sandstone. The water quality diminishes with depth.

















 

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ILLINOIS STATE GEOLOGICAL SURVEY
INSTITUTE OF NATURAL RESOURCE SUSTAINABILITY     |    UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN

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Updated 2/7/2007 SLD