... crest of the escarpment 2400 to 2700 feet high. The Allegheny Front crosses Pennsylvania in a sweeping curve toward the northeast for a distance of 230 miles, until it merges obscurely with the zigzags of the anthracite region in the northeastern...
Regional and Economic Geography of Pennsylvania: Physiography - Page 57
by Walter Sheldon Tower - 1906 - 69 pages
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