Bedrock geology of the Serpent Mound cryptoexplosion structure, Adams, Highland, and Pike Counties, Ohio / by Stephen P. Reidel ; State of Ohio, Department of Natural Resources, Division of Geological Survey.
- Relief shown by contours and spot heights. "Base compile from the Byington and Sinking Spring 7 1/2-minute topographic quadrangle maps (1961)." Includes text and location map.
- Ohio, Division of Geological Survey
- Held by
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