BUFFALO HART MORAINE. 75 



raphy. This belt lias an average width of nearly 2 miles. East from it 

 there are scattering knolls of considerable prominence, one at the town of 

 Mount Pulaski being nearly 30 feet in height. 



The connections of this belt with other moraines are rather vague. 

 There is, however, toward the southeast, a series of mounds and short ridges 

 occupying the interval between the southern end of this moraine and the 

 northern end of the ridged drift of the Kaskaskia Basin. In case those 

 ridges prove to have been formed by an ice sheet occupying the district east 

 of them, the Buffalo Hart moraine would seem to be a natural northward 

 continuation of the belt. 



The northern terminus of the Buffalo Hart moraine is in the form of a 

 very prominent mound, rising 150 feet above the bordering country, or 

 about twice as high as any of the other knolls in the moraine. It is known 

 as Elkhart Mound, being situated about a mile east of the village of Elkhart, 

 and has been a landmark from the early days of settlement, It commands 

 a view for 20 miles or more in all directions. From this mound a low ridge 

 leads off westward about 3 miles, where it merges into the general upland 

 plain. There are two lines of possible continuation for this moraine. The 

 eastern line would lead northward through western Logan and eastern 

 Mason counties and embrace a series of knolls scattered over that region. 

 The western line would follow the low ridge westward and cross the Illinois 

 River near the mouth of Sangamon River and there connect with the small 

 drift rido-e mentioned above which occupies southern and western Fulton 

 County. The features are too vague to make a satisfactory correlation 

 along either line. It seems preferable, therefore, to leave the belt without 

 an attempt at definite correlations. 



The drift in this moraine, like that in the bordering plain, consists 

 mainly of till. Even the very prominent Elkhart Mound has till exposed 

 where the road crosses its northern slope. There are, however, local devel- 

 opments of gravelly material in some of the knolls and ridges, as in the 

 Kaskaskia system of ridges. The moraine is covered with loess, usually to 

 a depth of 12 or 15 feet, and this obscures greatly the underlying drift and 

 renders it difficult to discover places where gravel may be obtained. 



The knolls scattered over southern and western Logan County have 

 been found in some cases to contain considerable sand, but they also, like 

 the knolls of the moraine, appear to be composed principally of till. 



