ISGS - Cross Sections of Stratigraphic Units
Cross Sections Showing the Uppermost Stratigraphic Units and All Stratigraphic Units in Lake County, Illinois
Uppermost stratigraphic units
Cross sections through the uppermost stratigraphic units in Lake County, Illinois. The Quaternary and Silurian are important aquifers for residential use.
All stratigraphic units
Cross sections through stratigraphic units in Lake County, Illinois, illustrating the morphology of important aquifers and aquitards.
Updated 10/27/2009 SLD