Cook County Atlas Maps in PDF Format
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Ancell Group
Structure on top of the Ancell Group (2.0 mb)
Thickness of the top of the Ancell to the top of the Ironton Formation (1.4 mb)
Topography
Topography of Cook County (2.7 mb)
Eau Clair Formation
Structure on the top of the Eau Claire Formation (2.1 mb)
Thickness of the Eau Claire Formation (912 k)
Galena-Platteville
Structure on top of the Galena Group (2.5 mb)
Thickness of the Galena-Platteville interval (1.4 mb)
Ironton-Galesville
Structure on the top of the Ironton Formation (2.1 mb)
Thickness of the Ironton-Galesville interval (1.4 mb)
Maquoketa Group
Thickness of Maquoketa Group (1.9 mb)
Mt. Simon Formation
Structure on top of the Mt. Simon Formation (2.7 mb)
Quaternary Deposits
Thickness of the Quaternary deposits (2.7 mb)
Silurian Strata
Thickness of the Silurian strata (4.8 mb)
Updated 10/23/2009 SLD