Browsing Presentations by Author "Schumacher, Gregory A."

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  • Venteris, Eric R.; Shrake, Douglas L.; Larsen, Glenn E.; Pavey, Richard R.; Schumacher, Gregory A. (Ohio Department of Natural Resources; Division of Geological Survey, 2011-03)
    The Ohio Department of Natural Resources (ODNR), Division of Geological Survey has completed a reconnaissance map showing areas of mineable sand and gravel resources in the Mansfield, Ohio, 30 x 60 minute (scale 1:100,000) ...

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