176 
K. F. Mather 
stream causing its waters to back up into a lake, which, overflow- 
ing across the divide into a tributary to the Muskingum, would 
cut down the channel at the Licking Narrows. 
Under this theory the present terraces in the valleys of the Lick- 
ing and its tributaries would be deposits formed in the waters of 
this one large lake. Moreover, the drift which fills the Newark 
valley for a distance of three or four miles east of the Hanover 
dam would be in the nature of subaqueous outwash. It has 
already been shown"* that this drift-filling is a deposit from a valley 
dependency of ice extending as far as the drift is found. 
It is the purpose of this paper to show that a similar depend- 
ency stretched out down the Licking valle}/ past Claylick, that no 
large lake occupied the valley at this point, and that the last cap- 
ture and reversal of drainage in the Newark valley was accom- 
plished before the invasion of the ice sheet. 
The glaciation of the region. The ice of the Illinoian glacial 
stage entered this region from the west, and its frontal position 
was that of an irregular line drawn north and south through Clay- 
lick. At the time of the ice-advance the region was maturely 
dissected and the topography had a great influence on the work 
of the glacier.® In the valleys, tongues of ice extended for some 
distance in front of the main lobe while on the highlands the 
advance was retarded. Valley trains of sands and gravels stretch 
down the stream channels away from the ice-front. 
It is quite difficult to map the exact limit of the ice as there are 
no topographic features, such as a terminal moraine, to help in the 
work, and because there was so much fluvio-glacial action which 
carried drift far beyond the edge of the ice. 
The valley terraces. Between Claylick and the Nariows, the 
Licking river has four tributaries which join it from the south; 
these are designated A, B, C and D (fig. i).® The first three of 
these streams flow in relatively broad valleys somewhat filled with 
drift. One of the most striking characteristics of these northward 
trending valleys is the persistent terrace which is found in each 
^Carney: Bull. Set. Lah. Denison Univ., “The Glacial Dam at Hanover,” vol. 
xiii, pp. 139-153. 1907- 
® Leverett: Loc. cit., p. 222. 
® I am obligated to Mr. J. H. Jennings and to Mr. W. H. Herron, geographers 
of the U. S. Geological Survey, for an advance sketch of this portion of the Newark 
and Frazeysburg topographic sheets. 
