(above and facing page). Geologic map of the Delhi Pike study area. See figure 1 for location. Contact between the Kope (Ok) and Fairview (Of) Formations is exposed in cut slope in western part of the map area. Contact was projected through map area using apparent dip angle from published geologic maps of areas directly across the Ohio River in Kentucky (Gibbons, 1972). The Fairview Formation was assumed to be 30 m thick.