COEBELATIVES OF BLOOMINGTON MOEAINIC SYSTEM. Ill 



Pebbles in esker near Anderson, Ind. 



Feet. 



Limestone, blue 36 



Limestone, buff 54 



Quartz 4 



Chert; probably from the limestone 14 



Crystalline rocks; mainly granite 22 



130 

 These pebbles are subangular to well rounded, especially the limestones. The granites 

 were not much rounded. No striated pebbles were observed. 



RIDGES AND BOWLDER BELTS. 

 GENERAL RELATIONS. 



Short morainic ridges and bowldery strips in the vicinity of the Wabash Valley in Tippe- 

 canoe and bordering counties may be correlatives of the inner part of the Bloomington morainic 

 system of the Illinois lobe, for at the west they are separated but little from the ridges of that 

 system. One weak moraine and bowlder belt passes through the city of Lafayette, and other 

 weak moraines or undulating strips he between it and the Linden-Darlington bowlder belt. 



HIGHGAP RIDGE. 



The southernmost definite ridge of this district is known to the residents as Highgap Ridge. 

 It leads eastward from the Wabash Valley at West Point to Taylor station on the Chicago, 

 Indianapolis & Louisville Railway, and, after an interruption of about 2 miles at the valley of 

 Big Wea and Little Wea creeks, continues eastward to Culver, beyond which it appears to be 

 merged with the Stony Prairie belt discussed below. West from the Wabash it becomes blended 

 with the innermost strong moraine of the Bloomington system and takes a northwestward 

 course to Pine village. The most prominent portion of its independent course is that between 

 West Point and Taylor, where a stretch of sharp knolls and ridges 15 to 40 feet in height, inclosing 

 basins holding ponds, occupies a belt about one-half mile in width. The portion east of Wea 

 Creek has a swell and sag topography with few basins. Its north edge was cut into sharply by 

 what appears to be a line of border drainage connected with the next later belt. 



In the portion between West Point and Taylor it is very gravelly, being httle else than a 

 chain of kames, but in the remaining portion till apparently predominates over gravel and sand. 

 The surface is in places thickly set with small stones, but bowlders or large stones are not con- 

 spicuous. 



STONY PRAIRIE BOWLDER BELT. 



A belt named from Stony Prairie, in western Clinton County, is not only exceptionally 

 bowldery but carries numerous small drift hummocks 10 or 12 feet high that put it in contrast 

 with smooth tracts on its borders. Bowlders are present in great numbers in sees. 15, 16, 9, 

 10, 3, and 4, Washington Township, and in sees. 33 and 34, Madison Township, in a belt about 

 one-half mile wide, but are not rare east of this belt for 2 miles or more. 



From the south end of the Stony Prairie bowlder belt Twelvemile Prairie runs south of 

 east to Kirklin. Its surface is not hummocky nor thickly strewn with bowlders but is suffi- 

 ciently ridged to present a well-defined crest and may mark the continuation of the ice margin 

 in that direction. It is, however, too vague to be interpreted with certainty. 



From the north end of Stony Prairie a weak belt of small knolls and shallow basins leads 

 westward to the north side of South Wildcat Creek near Mulberry, recrossing the creek south 

 of Dayton. Between the two crossings and from the second crossing westward a shallow 

 channel, apparently formed by ice border drainage, follows the southern edge of the undulating 

 belt closely to the Wabash Valley about 4 miles south of Lafayette. This belt fades out in the 

 vicinity of the Wabash Valley and is not continued west of the river, unless it is merged with a 

 later belt that crosses the river in the city of Lafayette. 



