Map of the Berea sand of southeastern Ohio, northern West Virginia, and southwestern Pennsylvania
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Oil and Gas Investigation Map↗
Geology topics
R.D. Holt
Publications and source records attributed to R.D. Holt.
Map of the Second Berea sand in Gallia, Meigs, Athens, Morgan, and Muskingum Counties, Ohio
Explore the source record for details and available documents.
Oil and Gas Investigation Map↗