Many years ago, while engaged in field work in western Pennsylvania and eastern Ohio, the writer became interested in the geomorphic features there displayed and, after considerable study, became satisfied of the presence, some distance below the highest points in the landscape, of rather extensive remnants of a peneplain which, in all probability, was much younger than the Schooley (Kittatinny) peneplain that Davis and Wood2 had recognized farther east and described a few years previously, but he found no reliable data for a more accurate determination of its age. At that time little or no geomorphic work had been done in the western part of the State—Davis’s activities having been largely confined to the region east of the Allegheny Front and to the northern part of New Jersey—and no one had attempted to correlate the surface features east of the Allegheny Front with those in the coal . . .

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