402 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



is thin there is usually till, gravel, or sand resting directly upon the rock. 

 A fuller discussion of the silts of northern Ohio is given in connection with 

 descriptions of later moraines. 



About 1890 a deep well was made in the southern end of Copley Marsli, 

 one-half mile west of New Portage, in which the drift was found to have a 

 thickness of nearl}^ 400 feet, and the rock floor an altitude about as low 

 as the surface of Lake Erie. The boring is on a tributary of Tuscarawas 

 River, and therefore south of the present continental divide. However, a 

 broad lowland tract, deeply filled with drift, leads from it northward to the 

 Cuyahoga Valle}', indicating that this deep channel once had a northward 

 discharge. Borings, though not numerous, are sufficient to indicate that 

 the rock floor of the Cuyahoga has been cut to a very low level, and the 

 valley may have been an outlet for some of the northern Ohio draiiiag'e, 

 as already discussed in Chapter III. 



In the Tuscarawas Valle}' at Clinton, near the inner margin of this 

 morainic system, several flowing wells have been obtained from the drift. 

 They are on low ground near the Ohio canal, and but a few feet above the 

 level of the river. Their depth is 35 to 40 feet, and water rises about 5 

 feet above the level of the canal. They are mainly through blue silt, 

 which- is described by the well owners to be putty-like and free from grit. 

 The water is (ibtained from an underl5'ing gravel bed. There are several 

 wells between Clinton and New Portage which peneti-ate a similar blue 

 silt and obtain water from gravel beneatli it, but the water does not overflow. 

 On Charles Harmon's land, in the Tuscarawas Valley near Mud Lake below 

 Clinton, is a boring which struck rock at 80 feet, but this is a remarkably 

 shallow depth to rock. 



At Canal Fulton, which is situated in the midst of the moraine, rock is 

 exposed in the west bluff to a considerable height above the Tuscarawas 

 River, but on the east side of the river wells 60 to 80 feet deep do not reach 

 rock. In these wells a small amount of blue till is struck, but the material 

 is mainly sand and gravel. 



Newberry has made the following statements concerning the drift in 



the Tuscarawas Valley below Canal Fulton:^ 



From Fulton to Millport and thence to Massillon many borings have been made, 

 and in these where the course of the auger was not arrested bj* bowlders the drift 



' Geology of Ohio, Vol. Ill, pp. 152-153. 



