MAIN MOEAINIC SYSTEM OF THE SCIOTO LOBE. ' 383 



From southern Stark County the morainic system under discussion 

 swings abruptly westward, and between there and Mansfield covers a traet 

 8 to 14 miles wide, the greatest width being in the vicinity of Killbuck 

 Creek, where it is separated into three somewhat distinct belts with inter- 

 vening tracts 2 miles or more in width, in whicli morainic features are rare. 



Immediately west of Mansfield the whole system swings abruptly 

 southward. Its breadth for a few miles along the western border of the 

 highland tract of Richland County is but 5 or 6 miles, but south of this 

 tract it spreads out, the main belt continuing southward, while a some- 

 what distinct outer moraine passes eastward along the south border of 

 the highlands nearly to Mohican Creek at Greersville, where it also turns 

 southward. At this eastern point it is separated by an interval of but 

 4 miles from the outer portion of the moraine that lies north of these 

 highlands. 



Where this eastern member of the belt swings southward (near Grreers- 

 ville), the breadth covered by the whole morainic system is fully 25 miles, 

 but the strongly morainic features are found mainly within the western half. 

 There is scarcely a square mile, however, on the eastern half of the belt 

 which does not contain drift knolls of rather sharp contour. Apparently 

 the eastern portion was occupied by the ice sheet for a much briefer period 

 than the western, the drift being thinner as well as less closely aggregated 

 into knolls and ridges. 



From this point of greatest expansion the eastern and western mem- 

 bers converge, the breadth of the system decreasing toward the south to 

 about 16 miles, in the latitude of Newark, and 13 or 14 miles at the 

 Licking reservoir, and southward from there to Lancaster. The system 

 consists, near Lancaster, of three distinct members, separated from each 

 other by intervals of 2 to 3 miles, in which morainic features are rare. 

 Throug'hout this north-to-south portion of the eastern limb of the Scioto 

 lobe one member, the inner or western, is maintained distinctly and has 

 a breadtli ranging from 4 up to 10 miles. The remainder of the system is 

 made up of two more or less distinct members, whose variations in width 

 and strength are great, as shown in PI. XIII. 



Near Lancaster the morainic system shifts abruptly westward a few 

 miles, producing the appearance of a shoulder or slight lobation north of 

 the city, after which it trends west of south to the Scioto Ri^-er, the inner 



