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This polygon feature class is a derivative dataset of the 31 consolidated aquifer feature classes. The dataset was created using a series of "union" functions, beginning with a union of Ohio's youngest water-bearing formation (Permian Dunkard aquifer) with the next stratigraphically oldest water-bearing formation (Pennsylvanian undivided aquifer). The resulting feature class was then used in a subsequent union with next progressively older aquifer formation feature class. This process was repeated until all 31 consolidated aquifer feature classes were included. The final dataset is a feature class of polygons representing the location of all consolidated aquifers throughout Ohio that maintains attributes in correct stratigraphic order. When using the identify tool on this feature class, the results show the bedrock aquifers from the top (highest elevation) to the bottom (lowest elevation) for any area in Ohio. |