Fig. 1), except for the deflection by the Big and Little offsets, and maintains a height of 1,200 to 1,600 feet even with a crest at times not over fifty feet wide. Most of the other ridges are of more steeply inclined strata, giving a fairly symmetrical...
Regional and Economic Geography of Pennsylvania: Physiography - Page 47
by Walter Sheldon Tower - 1906 - 69 pages
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