A main goal of this project was regional stratigraphic correlation in the 3 state study area using a consistent set of formation picks and names. Historically subsurface Cambrian stratigraphy in Ohio, Kentucky, and West Virginia was a confusing mixture of formation names extrapolated from outcrop sections, which were often far removed from the Appalachian Basin. In addition, drillers? terminology had been mixed with formal stratigraphic names. The results of this study have improved stratigraphic correlations and relationships in the 3 states, but we are not proposing new stratigraphic names at this time. Much of the confusing terminology is used in Ohio, where Janssens (1973) applied the Rome and Conasauga Formations to rocks which are not equivalent to those formations elsewhere in the basin. This problem and recommended usage is discussed more fully in Chapter 4.