The physical geography of New York state . slope is very abrupt, and inChautauqua County it ascends to a height of 500 feet ina very short distance. The escarpment is less distinctin Erie County, but becomes more pronounced toward theeast, in Seneca and Cayuga counties, while still furthereast it becomes sufficiently high to form the HelderbergMountains. Therefore, for some distance, the northernboundary of the Plateau province, as well as that of theCatskill region (p. 8), is a single deposit of limestone, whichforms an escarpment in some places rising a thousand feetabove the lower plain. LA
The physical geography of New York state . slope is very abrupt, and inChautauqua County it ascends to a height of 500 feet ina very short distance. The escarpment is less distinctin Erie County, but becomes more pronounced toward theeast, in Seneca and Cayuga counties, while still furthereast it becomes sufficiently high to form the HelderbergMountains. Therefore, for some distance, the northernboundary of the Plateau province, as well as that of theCatskill region (p. 8), is a single deposit of limestone, whichforms an escarpment in some places rising a thousand feetabove the lower plain. LAKE SHORE PLAINS —At the base of the escarp-mont, north of the plateau, lies a plain. In the west, along 1 See Lincoln, Araer. Journ. Sci. XLIV, 1892, 290. 2Vanuxem, Geology of New York, Part III, 1842, 24; Darton, Report 47, NewYork State Museum, 1894, 394-396; 427-428. :i Hayes, Amer. Journ. Sci. XXXI, 1837, 241-247; Vamixem, Geology of New III, 1842, various pages; Hall, Geology of New York, Part IV, 1843, various. (10)
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