BORDER OF THE ILLINOIAN DRIFT. 223 



County near Needmore, at which villag-e, as noted by Wright in Bulletin 

 58 of this Survey, it crosses to the south side of Beanblossom Creek and 

 soon rises to an elevated divide between Beanblossom and Salt creeks. 

 The border lies along- the south slope of this dividing ridge for several miles, 

 furnishing bowlders which have been rolled down the ravines to the valley 

 of Salt Creek. A short distance east of Nashville, the county seat of Brown 

 County, the border crosses Salt Creek, and, swinging southward, passes 

 through the elevated eastern range of townships occupied by the Knobstone 

 escarpment to the extreme southeast corner of the county. 



Upon ])assing fron^ Brown into Jackson Count}^, Ind., the drift border 

 descends from the Knobstone escarpment to the low country on the east, 

 and follows nearlj^ the base of the escarpment southward through Jack- 

 son, northeastern Washington, and southwestern Scott counties into Clark 

 County. It continues southward in Clark County to the Ohio River at 

 Jeffersonville, Ind., and there makes an abrupt turn to the east, as indicated 

 in PL II. 



The border apparently follows up the Ohio Valley about to Bethlehem, 

 Ind., 25 miles above JefFersonville, before rising to the uplands south of 

 the river, thus making a pronounced loop in the Devonian shale basin. 

 Thence it passes in a northeast course near Bedford, the county seat of 

 Trimble County, Ky., to the mouth of the Kentucky River, at CarroUton, 

 Ky. East of the Kentucky River it follows nearly the divide between 

 Eagle Creek and the Ohio River as far as the bend of Eagle Creek near 

 Glencoe, though the ice sheet in places extended a little beyond the divide 

 aud deposited a small amount of drift in the headwaters of tributaries of 

 Eagle Creek. From Grlencoe the border leads northeastward past Rich- 

 wood to the Licking River. It extends beyond the divide which separates 

 Gunpowder Creek from Mud Lick and Big Bone creeks far enough to 

 include the headwaters of the two last-named creeks. From near Rich- 

 wood to the Licking River, Bank Lick Creek flows near the glacial bound- 

 ary. On the ridge between the Licking and Ohio rivers there is but little 

 drift, yet a few pebbles occur as far south as Fort Thomas. From Fort 

 Thomas the drift border follows up the Ohio Valley to the vicinity of 

 Ripley, Ohio, as long since noted by Wright. 



Upon passing into Ohio, the border, as traced by Wright, crosses 

 southeastern Brown, northwestern Adams, southeastei-n Highland, and 

 northwestern Pike counties in a southwest-northeast course, and comes to 



