230 THE ILLINOIS GLACIAL LOBE. 



short, rather sharp, ridges. The most prominent ridge traverses sees. 25, 

 26, and 36, T. 18, R. 13 W., and its highest points stand fully 50 feet 

 above the bordering plain, yet its width, including slopes, is scarcely one- 

 half mile. A lower ridge passes north-south through sees. 16 and 21. In 

 sees. 9 and 10 also there is a low ridge which trends WNW.-ESE., and 

 stands perhaps 20 feet above the bordering plain. Blue Mound, a sharp knoll 

 in sec. 11, stands 55 feet, by. aneroid, above the border plain and covers 

 about 30 acres. In sees. 10 and 15, T. 18, R. 12 W., a well-defined undu- 

 latory ridge occurs which carries shallow basins on its crest and slopes. 

 There are several knolls 10 or 15 feet high in sees. 7 and 18 of this town- 

 ship, which should probably be referred to this morainic belt. From Blue 

 Mound, in sec 11, T. 18, R. 13 W., to sec 27, T. 18, R. 11 W., a distance 

 of 10 miles, only occasional low ridges and knolls are to be seen, the 

 highest of which rise scarcely more than 15 feet above the bordering plain. 

 But from sec. 27 southeastward to the Wabash River bluff near Eugene, 

 Indiana, a distance of 7 to 8 miles, there is a well-defined ridge, about a 

 half mile in width, whose highest points rise 40 feet or more above the 

 bordering plain, while its lower points seldom fall below 20 feet. It carries 

 winding ridges and sharp knolls on its surface, among which shallow basins 

 are inclosed. 



East from the Wabash River this moraine has, as a rule, a gentle 

 swell-and-sag topography, with undulations of 10 feet or less and a relief 

 of scarcely 20 feet. In the vicinity of Rynear, however, in sees. 2 and 3, 

 T. 19, R. 7 W., there is a chain of knolls standing 20 to 40 feet higher than 

 the plain on the north, and occupying a belt about a half mile in width. The 

 Cleveland, Cincinnati, Chicago and St. Louis Railway passes over a spur 

 from this ridge just east of Rynear, while west of the village it passes through 

 a gap in the ridge. In sec. 9 the ridge takes a IsTE. to SW. trend and is dis- 

 tinctly traceable to the southwest part of the section. The remainder of 

 this belt consists of knolls more or less closely aggregated but seldom 

 exceeding 1 feet in height. 



The weak belt leading northward from Veedersburg to Rob Roy has 

 no prominent knolls except in the northern portion. The slight undula- 

 tions which it presents, however, are in decided contrast to the very flat 

 surface of the plain on the west. Although the moraine has but feeble 

 expression its relief is sufficient to cause the southward deflection of Coal 



