. Early Pennsylvanian paleotopography and depositional environments, Rock Island County, Illinois . System Group Formation Pi Composite Section 7W ^kl. MC CORMICK CASEYVILLE rTTT7 1 ABBOTT Group Formation Composite Section cr 3 O co o O Q 3 rr SILURIAN DEVONIAN System NIAGARAN

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Keywords: ., bookcentury1900, booksubjectgeologystratigraphic, booksubjectpal