Map of Blanchard River Basin (upper portion) showing availability of underground water
Map side also contains legend and explanation of map symbols.
Text includes information about generalized stratigraphic sequence of the rocks in the Blanchard Basin, quality of underground water, and hydrograph of well ha-3.
"Prepared by ALFRED C. WALKER, Geologist, Ohio Division of Water, from data compiled by Lawrence R. Brunstetter".
Scale bar lower right corner.
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