..., Pennsylvania, and Ohio, and concurred with the deltaic origin for the westernmost Medina group sandstones. Van Tyne (1966) conducted subsurface studies by correlating geophysical well logs of the “Clinton” sandstones of the Medina Group in western New York with those of the outcrop area and concluded...

.... This diagram is made on the same principle as the others. Curves for New Straitsville, Ohio, and Lawrence county, Illinois, 1 are included on the graph. The three curves agree fairly well, but differ enough to show the desirability of having a special curve for every field and every pool where possible...