POWELL MORAINE. 



525 



The moraine is narrowest in its eastern limb, where its width is scarcely 

 a mile. The remainder of the belt is 2 to 3 miles wide. 



RANGE IN ALTITUDE. 



The highest points on the moraine are in the northern part of the 

 eastern limb where an altitude of 1,200 feet is attained. On the western 

 limb few points exceed 1,100 feet. In the Scioto Basin the lowest points 

 are slightly above 900 feet. The range in altitude, therefore, along the 

 whole course of the moraine scarcely exceeds 300 feet. There is not an' 

 abrupt change in altitude as in the hilly districts, but a gradual rise from 

 the basin to its borders. The following table, compiled from railway surveys, 

 shows the altitudes of points on and near the crest of the moraine, beginning 

 at the western rim and passing eastward along the moraine: 



Altitudes along the Powell inoraine. 



Pottersburg Station 



Summit near Marysville 



Summit near Powell 



Summit north of Worthington . . 



Sunbury 



Near Marengo 



Mount Gilead, summit in village 



Iberia 



Gallon - 



Summit near Crestline 



East of Shelby 



Erie R. R 



Big Four R. E 



Hocking Valley R. R 



Big Four R. R 



Cleveland, Akron and Columbus R. R 



Ohio Central R. R 



Barometric from Ohio Central R. R 



Big Four R. R 



Big Four R. R 



Big Four R. R 



Barometric from Big Four R. R 



Altitude 

 {above tide). 



Feel. 



1,093 



1,038 



935 



968 



970 



1,155 



1,150 



1,156 



1,169 



1,177 



1,140 



Where not combined with earlier ones this moraine has a well-defined 

 and abrupt relief of about 40 feet on its outer border, and throughout much 

 of its course has an equally great but less abrupt relief on its inner border. 

 Several railroad profiles that cross the moraine had been examined before 

 the writer visited this district, and from them a correct idea of the contour 

 of the moraine in cross section was obtained. In places the oiiter border is 

 so abrupt that upon entering the moraine the railroad is obliged to make 

 cuttings. Such is markedly the case on the Hocking Valley Railroad south 



