MAIN MORAINIC SYSTEM OF THE SCIOTO LOBE. 387 



district west of it, does not possess a marked relief. This is due to its being 

 heaped up in irregular accumulations instead of in the form of a definite 

 ridge. 



TOPOGRAPHY. 



The height, degree of sharpness, closeness of aggregation, forin, and 

 trend of the knolls and ridges which constitute this morainic system, vary 

 greatly, both in the pronouncedly morainic and in. the more vaguely defined 

 portions of the belt. In general, however, it may be said that the system 

 consists of rather small but well-defined knolls and ridges somewhat closely 

 aggregated. The height of knolls and ridges usually falls below 20 feet, 

 though instances were noted where it becomes as g-reat as 75 feet. A 

 knoll 20 feet in height covers usually 2 acres or more, though it occasion- 

 ally occupies a much smaller area. The prevailing form is a somewhat 

 symmetrical cone, but in association with knolls of this form there are 

 hillocks with irregular or hummocky surface, and ridges with various form 

 and trend. Basins are not common except in the interlobate portions, 

 and even there they are not conspicuous. In the interlobate belt formed 

 at the junction of the Scioto and Grand River lobes, there are several 

 basins a square mile, more or less, in area, which are occupied by small 

 lakes. The most prominent of these are the Twin Lakes, near Earlville, in 

 Portage County, and Springfield, Summit, Long, Turkeyfoot, and Mud 

 lakes in Summit County. Of these, all except Springfield Lake lie in 

 gravel plains whose general level is but a few feet higher than the surface 

 of the water, but Springfield Lake is bordered on all sides by prominent 

 moraine hillocks. 



The portion of the interlobate tract lying north of the bend of the 

 Cuyahoga was formed, in jaart at least, in conjunction with a later series of 

 moraines in connection with which it will be discussed. 



South of the bend of the Cuyahoga, the interlobate moraine lies 

 mainly east of the meridian of Akron, and is so closely associated with the 

 western limb of the main Graiid River morainic system that no distinct line 

 of separation could be found. A line drawn directly from the point of 

 separation near Canton, northward past Kent, passes through a goodly 

 number of small gravel plains situated among the moraine hillocks, and 

 these features appear to be the natural results of a junction of ice lobes, 

 while the strise on either side of this line indicate clearly a movement from 



