548 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



The Wabash moraine throughout much of its course presents an abrupt, 

 bluff-like outer border relief of about 30 feet, but the relief ranges from 20 

 feet or less up to 50 or 60 feet. After the moraine bears away from the 

 Wabash River, in northern Wells and western Allen counties, the relief 

 above the outer border plain is usually but 20 to 25 feet and occasionally 

 but 10 to 15 feet above this plain. North of the old lake outlet the crest 

 of the moraine stands 20 to 50 feet above the valley-like plain which occu- 

 pies much of the outer border. The slope is, however, so broad that the 

 relief is not so striking a feature as in the southern portion of the loop, 

 except locally. Near Hunterstown, for example, there is a rather abrupt 

 rise of about 20 feet from the marshes into the border of the moraine. 



On the inner border there is a gradual descent from the moraine to the 

 streams which follow the outer border of the Fort Wayne moraine, viz, 

 Brokensword Creek, Hog Creek, St. Marys River, and St. Joseph River. In 

 a few places the moraine rises abruptly 20 feet or more above the adjacent 

 portion of the inner border plain; quite as often, however, there is no abrupt 

 rise but a gradual transition froin the plain to the moraine. 



RANGE IN ALTITUDE. 



The range in altitude in the Indiana portion of this moraine is very 

 slight, the highest points being scarcely 900 feet above tide, while the low- 

 est points (aside from valleys of streams) are about 850 feet. In Ohio there 

 is a gradual ascent from about 850 feet at the Miami Canal to 1,025 feet at 

 the north border of the Scioto Marsh in Hardin County. The moraine then 

 drops to about 925 feet at the bend of the Scioto west of Marion, but rises 

 to 1,050 feet at its junction with' the Fort Wayne moraine near the head of - 

 Sandusky River. The combined belt eastward from there to Akron ranges 

 from about 970 feet in lowlands to 1,250 feet on ridges. 



The old lake outlet at Aboit, Ind., is about 750 feet above tide, or 

 nearly 100 feet below the altitude of the crest of the moraine through which 

 it has a passage. 



