412 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



the Wisconsin stage of glaciation. In the deeper part of the valley, also, 

 the drift is probably of pre -Wisconsin age. 



Wright reports a well on a range of hills nortli of Clear Fork, at an 

 altitude about 350 feet above the Hocking Valley, to have penetrated 40 

 feet of till, and another 20 feet. West of this range of hills, at Amanda, a 

 gas-well boring at the flour mill near the station passed through 60 feet 

 of drift, inainly till The altitude here is but 100 feet above the Hocking 

 Valley at Lancaster (933 feet above tide). In portions of the village rock 

 is struck at 10 feet or less. West from Amanda, on the divide, at an alti- 

 tude 150 feet above the station, the drift is shown by wells to be in places 

 60 feet thick. Mr. Stout has a well 62 feet deep, mainly till, that does not 

 reach rock. There are outcrops, however, between Stout's well and Amanda, 

 where the rock surface has an altitude but 25 feet lower than that of the 

 well mouth at his residence. A well at John Crumley's, 3 miles west of 

 Lancaster, on comparatively low ground near Hunters Run, penetrated 78 

 feet of sand and gravel and did not reach rock. At D. Crumley's, on the 

 Circleville and Lancaster pike, about 3 miles west of Lancaster, a well has 

 39 feet of drift, the upper 18 feet being yellow till, the remainder sand. 

 Near Crundey's bold ledges of sandstone rise to a height of 125 feet above 

 the well mouth, on whose surface tliere is scarcely any drift. A similar 

 isolated sandstone ledge in Lancaster, called Mount Pleasant, carries scarcely 

 any drift, aside from bowlders. 



On the uplands south of Circleville, near Thatcher, the drift is very thin 

 compared with its thickness east and northeast of Circleville, the difference 

 being due mainly to the absence of the inner or main member of the morainic 

 system on the uplands southeast of the city and its presence on those east 

 and northeast. 



In the Scioto Valley at Circleville two gas-well borings passed through 

 a large amount of drift, one in the west part of the city having penetrated 

 140 feet, and one on slightly higher ground, in the eastern part of the city, 

 187 feet. The rock floor is 520 and 540 feet above tide in the two borings, 

 the lower altitude being at the east well. In the west boring the drift is 

 mainly gravel, but in the east boring there was a thin bed of gravel at the 

 surface, apparently belonging to the outwash from the moraine, below which 

 there was a heavj- bed of blue tiU. 



