Description: The drift-thickness dataset of Ohio depicts the thickness and distribution of glacially derived sediments (called drift) and post-glacial stream sediments overlying the buried bedrock surface. This map was produced by subtracting bedrock-surface elevations from land-surface elevations to produce a residual map of drift thickness. This raster data set was created for use as a generalized drift thickness indicator.
Copyright Text: Ohio Department of Natural Resources-Division of Geological Survey