May, 1904.] Changes in the Drainage Near Lancaster. 



151 



there turns to the west, the valley widening until above Sugar 

 Grove it is about half a mile wide. From Bremen to Lancaster 

 there extends an old valley in places one mile broad and filled 

 wnth drift to a depth of over 200 feet. Before the ice epoch this 

 abandoned valley was the outlet for the waters of Big Rush 

 Creek, a small tributary heading at the narrow point just below 



— Present Draintige. 



— *^^^-PreglQcial Drainage. 

 Vdl/ey Wall 



* I mile 



Fig. 2. Map showing changes on Arney and Muddy Prairie Creeks, 



the Hocking county line where there was a low divide and flow- 

 ing north to Big Rush Creek, while a second headed on the other 

 side of the divide and flowed westward to the Hocking. The ice 

 blocked up the old outlet at Lancaster, turning the water over 

 this low col and cutting the present outlet. 



There is one point in connection with this abandoned valley 

 that Prof. Tight merely notices but does not connect with the 



