BROADWAY MORAINE. 535 



of yellow till, then a few feet of vsand, then a "hardpan crast," beneath 

 which there is water-bearing gravel. At Big Springs a rock outcrop just 

 north of the village stands considerably above the railway station, while in 

 the vicinity of the station Avells have struck rock at 12 to 38 feet. 



At West Mansfield the town well struck rock at about 100 feet. It is 

 mainly through blue till. Several other wells near West ]\fansfield have a 

 depth of 50 to 60 feet, and none reached rock. The general thickness of 

 the drift here is thought to be about 100 feet. 



On the, moraine about a mile southwest of Broadwa}- a well on ;i 

 farm formerly owned by Frank Welch is reported by him tci have struck 

 rock at 65 feet. 



At James Rodgers, on the crest of the moraine between Ostrander and 

 Scioto River, a well struck rock at about 50 feet. There is yellow till 10 

 or 12 feet, below which is blue till extending to the rock. 



Where the moraine crosses the Scioto Valley till is exposed near the 

 water's edge, but above it is a terrace capped with gravel. The bed of 

 the river here is on rock. The valley is fully 100 feet below the level 

 of the highest points in the moraine on each side. 



In Delaware there are outcroj^s of rock near the Hocking Valley Rail- 

 road station at a level but 12 to 15 feet below it, or 915 feet above tide. 

 The drift surface northwest from this quarry, on the moraine, reaches an 

 altitude about 30 feet above the station, and it is probable that the differ- 

 ence in altitude is due entirely to drift accumulation, though no borings 

 have been made to furnish complete evidence. 



From Delaware northeastward the drift has a thickness usually of but 

 20 to 30 feet. The morainic tracts are known as "clay land," and the 

 bordering plains "black ground," since there is but little black soil on the 

 moraines compared with that on the bordering- plains. ■ 



BOWLDERS. 



The number of bowlders is somewhat greater on this moraine than on 

 the bordering plains, but only one locality was noted where they are so 

 numerous as to be troublesome. This is in southern Hardin County, on 

 the east side of Silver Creek, about 3 miles from Kenton. Here, on the 

 farm of J. Y. Ross, there are several hundred within a space of 10 acres. 

 They are, so far as observed, all of Canadian derivation. Winchell noted 



