44 BULLETIN OF THE LABORATORIES 



and M the P. C. & St. L. Railroad has made a cut into the drift, 

 at the point indicated by the heavy dotted area on the map, 75 

 feet deep. At M the rocky hills are about two miles apart and 

 the valley plain between is so low and marshy that it is with 

 difficulty drained into the Wakalomaka creek. 



Just beyond Hanover the railroad has made a rock cut 60 

 feet deep through a spur of the rocky mass S while a well sunk 

 100 yards to the north revealed the fact that with that much de- 

 viation no rock would have been encountered. 



At w about one mile east of Hanover and only a short dis- 

 tance into the valley from the rocky hill S a well sunk 218 feet 

 passed through sand, gravel and clay but did not strike the 

 rock. It is very probable that the rock floor is much deeper 

 midway between the hills. The bottom of thp well extends 

 about 150 feet below the present level of the Muskingum at 

 Dresden. As rock was not reached the greatest depth of the 

 floor of the old valley is not known. 



The drift is composed largely of sand and gravel deposited 

 in broad sheets and as it is near the margin of the glaciated area 

 it seems quite reasonable to suppose that the western edge of 

 this deposit between the hills at Hanover represents the po'sition 

 of the ice front and that the deposit was made from the glacial 

 waters flowing east along the broad valley, and extended only 

 to the swamp land. Other facts also locate the limit of the 

 ice sheet very close to this point. 



East of the swampy area M and Frazersburg there ex- 

 tends a broad valley two miles wide bordered with gently slop- 

 ing hill sides and with almost a level flood plain over which the 

 very small stream Wakalomaka creek meanders with a very slug- 

 gish current to join the Muskingum at Dresden. Between this 

 old valley and the present Licking river there are three low 

 gaps. Through the eastern one the canal finds its exit. The 

 conclusion early arrived at was that this ancient valley was that 

 of the preglacial Licking. This was based on the general but 



