CORRELATIVES OP CHAMPAIGN MORAINIC SYSTEM. 89 



The supposed continuation in northwestern Hendricks County has a very mild expression 

 from North Salem southeastward for 5 or 6 miles, consisting merely of a wavy surface in which 

 the swells rise 10 to 25 feet above the sags. Near Milledgeville the inner border has sharp knolls 

 15 to 25 feet or more high, but is otherwise weak. A well-defined ridge sets in about midway 

 between North Salem and Danville and, except for a slight gap 2 miles northwest of Danville, 

 continues to that city. Where most prominent the ridge is not less than 50 feet in height and 

 yet is scarcely one-fourth mile in width ; through most of its length, however, it is but 20 to 25 

 feet high. West of this ridge another 2 miles in length ends on the south about 2\ miles west 

 of Danville ; it also has a width of only one-fourth mile and yet in places rises 50 feet above the 

 level of the plain to the west. East of these ridges are lower ones with less continuity, some of 

 them being slightly elongated knolls, but all conforming to the northwest-southeast trend of the 

 moraine. 



East of Hadley a series of several sharp ridges, individually 1 or 2 miles long with gaps of 

 hah a mile, fills in the space of 4 miles between Hadley and Danville. The width of the ridges 

 is one-fourth mile or less and their height only 15 to 25 feet. This morainic belt fades out in 

 the vicinity of the valley of East Fork of Mill Creek, except that a narrow strip of undulating 

 land continues southward along the divide between Mill Creek and West White Lick Creek 

 about to Clayton. 



The moraine in northwestern Johnson County covers a width of 1 to 4 miles and for part of 

 its course occupies the divide between streams flowing westward or southwestward to White 

 River and eastward to Youngs Creek, a tributary of East White River. East of Youngs Creek 

 the moraine is only about a mile wide. In western Johnson County a slight ridge with an outer 

 border relief of 15 to 20 feet is present for a few miles, but aside from this the moraine consists 

 of a series of loosely connected low swells. In the tract east of Franklin knolls are conspicuous, 

 several rising abruptly to heights of 30 to 40 feet. North of the moraine is a till plain bearing 

 scattered sharp knolls, and a well-defined esker having its southern terminus in the moraine 

 (p. 93). The most prominent knoll, Donnell Mound (in sec. 8, T. 12 N., R. 4 E.), rises 90 feet 

 above bordering low ground and is slightly elliptical, with its longer axis from northeast to 

 southwest, or about at a right angle with the moraine. Doty Mound (sec. 16, T. 13 N., R. 3 E.) 

 is not less than 75 feet in height and has very steep slopes. 



The moraine at Rushville and the bowlder belt which constitutes its westward continuation 

 are thought to be the continuation of the chain of moraines. In Shelby County the bowlder 

 belt is unattended by conspicuous knolls, except at the northern end of Mount Auburn Ridge, 

 where several sharp gravel knolls may be of Wisconsin age ; but from the vicinity of Rushville 

 northward it is combined with a well-defined moraine. It does not connect closely with the 

 eastern end of the Johnson County undulating strip, but appears about 5 miles southeast of 

 the latter on the opposite side of the great gravel plain of East White River. It leads down 

 the eastern slope of the Mount Auburn Ridge from its northern end nearly to Mount Auburn, 

 or for about -5 miles, and is traceable to the edge of a slough that forms one of the numerous 

 channels cut in the drift of Shelby County. It reappears east of this slough at Lewis Creek 

 station and is traceable northeastward to Cynthiana, where a few low knolls appear, beyond 

 which it is attended by scattered knolls northeastward to Rushville. For 6 to 7 miles north 

 from Rushville, or about to Hamilton station, there is a morainic ridge scarcely a mile in width 

 with undulating surface and abrupt outer border relief . Farther north this ridge spreads out 

 to about 2 miles and is less definitely ridged; most of its knolls are but 15 to 20 feet high, but a 

 group of them in sees. 16 and 21, T. 15 N., R. 10 E., is more prominent and includes one that 

 rises to 70 feet. 



STRUCTURE OF THE DRIFT. 



COMPOSITION. 



Along the chain of moraines the prevailing surface portion of the drift is bowlder clay, in 

 which pockets of water-bearing sand and gravel are so common that many wells are obtained 

 at depths of 12 to 20 feet. The water-bearing beds do not appear to form continuous sheets; 



