194 THE ILLINOIS GLACIAL LOBE. 



crosses the Illinois River immediately above the city of Peoria. In Peoria 

 Comity it passes immediately west of Aha, Dunlap, and Edelstein, leaving 

 the comity near the corners of Stark and Marshall comities. It there 

 becomes merged with a later moraine (the Bloomington), and is apparently 

 covered by the later sheet of drift throughout northern Illinois. 



Throughout much of its course in Illinois this moraine presents a bold 

 relief when viewed from the outer-border district. It is seldom less than 

 60 feet, and in places reaches fully 150 feet, above the outer-border plain. 

 It ordinarily presents a relief of 75 to 100 feet, The greatest relief (150 

 feet) is found in Edgar County, between Paris and Kansas. In Indiana 

 the relief is much less than in the Illinois portion of the moraine. Along 

 the Wabash Valley it amounts to scarcely 50 feet, while east from the 

 Wabash it is usually but 20 to 40 feet. 



When viewed from the inner border the moraine presents a perceptible 

 relief only along a small portion of its course. It usually merges into the 

 inner-border plain so gradually that the border can scarcely be mapped. 

 The relief on the inner-border plain is more pronounced for a few miles 

 north and south of the Illinois River than elsewhere in its course, but even 

 there it scarcely exceeds 75 feet. 



RANGE IN ALTITUDE. 



* >ccupying as it does a comparatively smooth country, the moraine 

 presents but a small range in altitude. In the Indiana portion the highest 

 points crossed by it are near Bainbridge, and have an elevation of about 

 950 feet above tide. At White River Valley it but little exceeds 600 feet, 

 and at the Wabash Valley it falls slightly below 600 feet. At the Illinois- 

 Indiana line the highest points on the moraine are scarcely 675 feet, but at 

 the Kansas geodetic station, only about 20 miles west from the State line, 

 a point on the moraine has a measured altitude of 839 feet above tide. 

 Westward from this geodetic station the altitude soon declines to 775 feet, 

 and throughout much of the interval between Kansas and Shelbyville it 

 stands 750 to 775 feet above tide. At the bluffs of the Embarras River, 

 however, it scarcely exceeds 700 feet, and at the Kaskaskia bluffs in Shel- 

 byville it is but 675 to 700 feet. Throughout much of the distance from 

 Shelbvville to the Sangamon River near Decatur the altitude is little more 



