CORRELATIVES OF BLOOMINGTON" MORAINIC SYSTEM. 



95 



The underlying rock surface shows nearly as much range as the drift surface, being over 

 1,000 feet near the Indiana-Ohio line, 570 feet in the vicinity of Indianapolis, 750 feet in western 

 Hamilton County, 380 to 400 feet in the Wabash Valley near Lafayette, and from 650 to 760 

 feet in the vicinity of Fowler. 



The altitudes of the drift surface and the rock surface on the inner plain, the drift belt, and 

 the outer plain along several north-south lines are given in the table below. The line through 

 Lynn shows a markedly higher rock surface at the crest of the belt than is found on the tracts 

 lying to the north and south. West of White River the rock surface is much higher outside of 

 than beneath the great drift belt, the drift being banked against the northeast face of a rock 

 escarpment in Hendricks and Montgomery counties. On the line passing through Lafayette a 

 great valley is crossed which leads westward from that city. The line running south from 

 Fowler crosses the same buried valley near the Benton-Warren county line. 



Altitude of drift surface and rock surface in cross sections. 



Crest .if 1 1n" 1)011. 



Outer plain. 



State line (Ohio and Indiana). . . 



Meridian of Lynn 



Meridian of Losantville 



Meridian of Newcastle 



Meridian of Kennard 



Meridian of Greenfield 



Meridian of Cumberland 



Tipton to New Ross 



Franklin to New Ross 



Meridian of Lafayette 



Merid km of Fowler 



State line (Indiana and Illinois). 



Feet. 



'108-1, 02S 

 Sill >- 1,111)1) 



Feet. 

 1,168 

 1,162 

 1,128 



Feel. 

 1,125 

 1,100 



a The crests of the several ridges diffei 



CHARACTER AND RELIEF. 



The moraines of the Bloomington system are conspicuous in the vicinity of the reentrant 

 angles where they connect with those of the Illinois lobe in western Indiana and with those of 

 the Miami lobe in eastern Indiana, but are so weak in much of the intervening course that it 

 is difficult to trace them individually across the State. In some places, where ridges and 

 knolls die out, bowlder belts mark the continuation of the ice border, and in some places even 

 these are lacking. 



Warren, Fountain, and Tippecanoe counties. — The portion of the belt in the vicinity of 

 the Wabash Valley in eastern Warren, northeastern Fountain, and southwestern Tippecanoe 

 counties comprises about all of it that is prominent east of the reentrant angle in western 

 Indiana. North of the Wabash, in eastern Warren County, two strong moraines, each about 

 2 miles wide, separated by a nearly plane tract about a mile wide, run northwest and southeast 

 with a billowy surface bearing a close aggregation of knolls whose height ranges from 10 feet 

 or less to about 30 feet. The inner or eastern border of the eastern of these two belts runs 

 from Pine Village toward Independence, leaving about 50 square miles of the northeast corner 

 of Warren County with very flat surface. South of the Wabash, in northeastern Fountain 

 and southwestern Lafayette counties, the morainic development is very irregular. Clusters 

 of sharp knolls covering a square mile or more, surrounded by gently undulating or nearly 

 plane tracts, can be linked into two parallel chains leading eastward and then southeastward 

 into Montgomery County. Some of the knolls in these clusters reach a height of 50 or 60 feet 

 and many reach 30 feet or more. Shawnee Mound, in southwestern Tippecanoe County, rises 

 60 feet above the surrounding country and SO feet above the marsh on its northwest border. 

 About 5 miles southeast is Cemetery Hill, also 60 feet high. 



In Tippecanoe County a gently undulating surface, extending entirely across the southern 

 townships, is about 100 feet higher than the next range of townships to the north. In places 



