. Glacial formations and drainage features of the Erie and Ohio basins. le-vated parts, near New Martinsville,northward to the end of the Panhandle,they show a decided tendency to pointup the valley at their junction withthe Ohio, as may be seen by referenceto fig. 2. If, therefore, attention were givensimply to altitudes of bordering uplandsand to the trend of the tributaries ofthe Ohio, the old divide would belocated near New Martinsville. It wasfrom these criteria that this location ofthe divide was sug-gested by Chamber- hn and the writer m 1894. While fig. l.—Probable preglaclal drainage
. Glacial formations and drainage features of the Erie and Ohio basins. le-vated parts, near New Martinsville,northward to the end of the Panhandle,they show a decided tendency to pointup the valley at their junction withthe Ohio, as may be seen by referenceto fig. 2. If, therefore, attention were givensimply to altitudes of bordering uplandsand to the trend of the tributaries ofthe Ohio, the old divide would belocated near New Martinsville. It wasfrom these criteria that this location ofthe divide was sug-gested by Chamber- hn and the writer m 1894. While fig. l.—Probable preglaclal drainage of the upper Ohlo,1 • ,11 J. 1 1 1 region. (Chamberlinand Leverett.) this still appears to have been an early divide, subsequent study of the gradation plains and valley deposits hasled to the impression that the divide had migrated before the establish-ment of the present drainage. The gradation plains along the Panhandleshow an exceptional intricacy. Instead of a single prominent system ofgradation plains, such as is commonly displayed in the Upper Ohio Scale of miles Am. Jour. Sci., 3d series, Vol. XLVII, 1S94, p. 253. 90 GLACIAL FORMATIONS OF EKIE AND OHIO BASINS. there are rock shelves and remnants of old valley floors on the borderof the Ohio at all levels from about 1,050 feet above tide down to about
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectgeology, bookyear1902
