Atlas Home | Topography | Faulting and the Des Plaines Disturbance | Quaternary Deposits | Silurian Strata | Maquoketa Group
Galena and Platteville Groups | Ancell Group | Ironton-Galesville Formation | Eau Claire Formation | Mt. Simon Formation | Maps - PDF format


Three-dimensional Representation of the Thickness of the Eau Claire Formation in Cook County, Illinois


large 3D image of the thickness of the Eau Claire Formation in Cook County, Illinois


Updated 10/23/2009 SLD

ILLINOIS STATE GEOLOGICAL SURVEY
E. Donald McKay, III, Interim Director

Terms of use         Privacy Statement

© 2009 University of Illinois Board of Trustees. All rights reserved.
For permissions information, contact the Illinois State Geological Survey.