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 
with drift to a depth of over 200 feet. Before the ice epoch this 
abandoned valle}’ was the outlet for the waters of Big Rush 
Creek, a small tributary heading at the narrow point just below 
J^'ig. 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 valle}- 
that Prof. Tight merely notices but does not connect with the 
