Surface Maps, Thickness Maps and a Three-dimensional Model of the Ancell Formation in Lake County, Illinois
               

Ancell Formation

In Lake County, the Ancell consists primarily of medium-grained St. Peter Sandstone. It is a moderately important groundwater resource, but its permeability and yield are not as high as the underlying Ironton-Galesville or Mt. Simon Sandstones.

Left is a three-dimensional representation of the thickness of the Ancell Formation to the Ironton Formation.

Updated 10/26/2009 SLD