This digital image was produced in the Summer of 2012 by the Maryland State Archives (MSA) from the original map held by the Maryland Geological Survey (MGS). We are indebted to the staff of the MGS and MSA for helping us make this these images available.This map is Plate 2-5 from Bachman, L.J., and Wilson, J.M., “The Columbia Aquifer of the Eastern Shore of Maryland”. Baltimore: Maryland Geological Survey, 1984 (Report of Investigations No. 40)
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