Abstract
The erosion surfaces of eastern Pennsylvania and adjacent areas are analyzed, and a correlation with the erosion surfaces of western Pennsylvania, eastern Ohio, eastern Kentucky, and southern New York is proposed. Three erosion surfaces and an extensive strath are found in both the eastern and the western areas. The Upland surface, common to both regions, is the only true peneplain. The younger erosion surfaces and the straths are correlated by their position below the Upland surface. The age of the surfaces is considered.
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