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These maps are computer generated and plotted on mylar. Scale: 1 inch equals about 4 miles. Contour interval is 50 feet. The maps were used to produce the regional bedrock geologic maps of the Bellefontaine (M8), Lima (M7), Marion (M9), and Piqua (M6) 1:100,000-scale quadrangles as part of the cooperative mapping effort of the Ohio Division of Geological Survey and the U.S. Geological Survey. Each map shows county boundaries, 1:24,000-scale quadrangle boundaries, and data values. Each map is $4.00. Please order by title and OF number.
| OF 274. |
Preliminary structure contour map of the top of the Ordovician undifferentiated for west-central Ohio |
| OF 275. |
Preliminary structure contour map of the top of the sub-Lockport undifferentiated for west-central Ohio |
| OF 276. |
Preliminary structure contour map of the top of the Silurian Lockport Dolomite for west-central Ohio |
| OF 277. |
Preliminary structure contour map of the top of the Silurian Tymochtee Dolomite for west-central Ohio |
| OF 278. |
Preliminary structure contour map of the top of the Silurian Greenfield Dolomite for west-central Ohio |
| OF 279. |
Preliminary structure contour map of the top of the Silurian Salina undifferentiated for west-central Ohio |
| OF 280. |
Preliminary structure contour map of the top of the Devonian Columbus Limestone for west-central Ohio |
| OF 281. |
Preliminary structure contour map of the top of the Devonian Delaware Limestone for west-central Ohio |
| OF 282. |
Preliminary structure contour map of the top of the Devonian Olentangy Shale for west-central Ohio |
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