Wells drilled below the Cambrian Knox Dolomite in Ohio, by M. T. Baranoski, 2004. Scale 1:500,000 (1 inch equals about 8 miles).This data set was created as part of a project to update and revise the Cambrian stratigraphy of Ohio. Data shows the location of Class 1 industrial waste disposal sites, brine disposal sites, locations with Cambrian and Precambrian core, loca-tions with Precambrian paleotopographic erosional high areas, and locations directional drilled below the Knox Dolomite.