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| | Ohio (Site not responding. Last check: 2007-10-08) |
 | | Bedrock in a Devonian outlier, the Bellefontaine outlier, made of Columbus Limestone and Ohio Shale, lies at a depth of about 150 feet, in a structural graben. |
 | | Soil Series: Miamian silt loam: deep, well drained, slowly permeable, brown to yellowish-brown soil developed on loess overlying calcareous glacial till, formed under hardwood forests. |
 | | Hansen, Michael C., 1991, Campbell Hill - - Ohio’s summit: Ohio Geology, Ohio Department of Natural Resources, Winter issue, p.1-3. |
| www.unh.edu /esci/ohio.html (159 words) |
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