Early Pennsylvanian paleotopography and depositional environments, Rock Island County, Illinois earlypennsylvani18lear Year: 1985 24 Guidebooklet: Illinois State Museum No. 4 \ WISCONSIN ILLINOIS O OZARK SHOAL y J ^> ^ A \) i j ~d- i W J ( -J KENTUCKY 50 Miles CINCINNATI SHOAL \ Figure 15. Paleogeography at an intermediate stage during Chesterian (Mississippian) sedimentation. From Swann, 1963.

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