224 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



Paint Creek Valley near Bainbridge, in soutliwestern Ross County. It then 

 follows this valley down to the Scioto near Chillicothe. 



Having- found that Wright's tracing of the glacial boundary east from 

 the Scioto niarks the limits of the Wisconsin drift, and not the limits of 

 glaciation, the writer has made a somewhat detailed tracing of the earlier, 

 or Illinoiau, drift border in that region. From the northern part of Chilli- 

 cothe the Wisconsin drift border passes northeastward to Adelphi, as indi- 

 cated by Wright, but the Illinoiau border lies several miles farther south. 

 Drift is well displayed directly east from Chillicothe as far as Mooresville, 

 a distance of 6 miles. The border there swings northeastward and follows 

 Walnut iCreek Valley to Charleston, beyond which place it continues over 

 high hills to the valley of Salt Creek at Haynes, passing about 3 miles 

 south of Adelphi. The occurrence of till on the elevated land south of 

 Adelphi was noted by Wright, ' but was not recognized as a sheet distinct 

 from the Wisconsin drift. 



From Haynes the Illinoiau border leads northward to South Perry, 

 where it apparently passes beneath the Wisconsin border. From South 

 Perry northeastward to Clear Creek, a western tributary of the Plocking 

 River entering about 8 miles below Lancaster, the Wisconsin drift seems to 

 form the border, though it should be noted that in places in this jjart of 

 its course its limits are a short distance beyond Wright's boundary line. 

 On the lower course of Clear Creek a glacial terrace which seems to be of 

 Illinoian age appears outside the limits of the Wisconsin. This terrace 

 stands 50 feet or more above the level of the terraces of Wisconsin age 

 found in that valley and the Hocking Valley, or about 100 feet above the 

 creek. It carries pebbles of granite and greenstone as well as local rocks, 

 and they are much more weathered than is the gravel of Wisconsin age. 



Near Revenge, on the north side of Clear Creek, the Illinoian drift 

 emerges from beneath the Wisconsin and passes eastward across the Hock- 

 ing Valley into northern Hocking County, its border being along the valley 

 of Rush Creek to the bend of the creek 4 miles south of Bremen. The 

 border there takes a northeast course past Junction City. From Junction 

 City the course is north-northeast to Jonathan Creek, passing about 4 miles 

 east of Somerset, and coming to Jonathan Creek near the line of Perry and 

 Muskingum counties. 



^ Glacial Boundary in Ohio, p. 61. 



