Campbell Hill
       7 ½’ quadrangle: Zanesfield, OH
       Logan County
       Vocational School

1,550 ft (472m)

Campbell Hill from the north. (1995)

Bedrock: No rock exposed at surface. Underlying bedrock is Devonian.

Quaternary (Pleistocene)

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. Normal faults, perhaps controlled by Precambrian basement faults along the Grenville front at depth, cut the Paleozoic rocks into fault blocks. The outlier may have been preserved due to greater resistance to erosion of the shales relative to limestones in horsts on either side.

Surficial Geology: Glacial till and loess: Moraine between the Miami ice lobe to the west and the Scioto lobe to the east, mantled by loess.

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. This is the "state soil" of Ohio.

Selected References:

  • Hansen, Michael C., 1991, Campbell Hill - - Ohio's summit: Ohio Geology, Ohio Department of Natural Resources, Winter issue, p.1-3.
  • Waters, D.D. and others, 1979, Soil Survey of Logan County, Ohio : U.S. Soil Conservation Service.

Other suggested sources of information:

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