I 



MAIN MORAINIC SYSTEM OF THE SCIOTO LOBE. 389 



Miller-sburg. The freshness of contour of this outer member is sucli as 

 to denote that it is not much older than the other members of the morainic 

 system. 



The main member, which crosses the Tuscarawas Valley above Massillon, 

 consists of closely aggregated, sharp knolls, 20 to 50 feet high, among which 

 are occasional basins. The morainic topography west of the Tuscarawas is 

 much weaker in expression than it is east of that stream, the knolls from the 

 Tuscarawas westward to Killbuck Creek being usually but 10 to 15 feet 

 high, and less closely aggregated and gentler in slope than in the interlobate 

 tract. On PI, XIII, two, and, in places, three, members of the morainic 

 system are indicated as crossing from the Tuscarawas to Killbuek Valley; 

 but it should not be understood that the belts have a clearly defined line 

 of separation; there is simply a comparative scarcity of drift knolls in the 

 portions indicated as nonmorainic. 



On Sugar Creek Valley there is, toward the south from the glacial 

 boundary at Beach City, a well-defined gravel plain or terrace, standing 

 about 35 feet above the stream, wliile toward the north the valley is occu- 

 pied by morainic knolls of gravelly constitution, and terracing is not well 

 exhibited. The terrace here appears, therefore, to connect with the outer 

 member of the morainic system. The knolls at the head of the terrace are 

 small, 5 to 10 feet in height, but farther north rise in some cases to a height 

 of 20 to 25 feet. 



In Killbuck Creek Valley there is at the glacial boundary a morainic 

 accumulation, filling it up to a height of 75 to 100 feet or more, whose 

 surface is gently undulatory, having knolls only 10 to 30 feet in height. 

 South from the glacial boundary is a plane-surfaced terrace standing about 

 70 feet above the creek. Wright called attention to this terrace in his 

 paper on the glacial boundary in Ohio, in the following words: 



The terraces upon the Killbuck are extensive both above and below the glacial 

 limit. One mile and a half below Millersburg, on the west side, on the farm of A. 

 Uhl, is a terrace about a quarter of a mile wide, containing kame-Iike ridges and 

 knolls, the surface of which is 102 feet above the flood plain. This gradually rises 

 until it is merged in the till of the hills beyond. Two miles farther south, in the 

 northwest corner of Mechanic township, near Stuart Mills, the terrace is composed 

 of finer material and is level-topped, and gradually descends toward the south, being 

 here but 70 feet above the flood plain.' 



'G. F. Wright: The Glacial Boundary in Ohio, Indiana, and Kentucky, 1884, pp. 45, 46. 



