492 FRANK CARNEY 
save for the presence of a lateral tongue reaching northward from the 
valley lobe that extended eastward into Muskingum County (Fig. 3). 
Less than one-half of the next township west, Mary Ann, was covered 
by ice; this ice had a very irregular front. The conspicuous drift 
knolls at Wilkins Run are alluded to by Wright,? and by Leverett. 
One of the most typical valley trains of this region was built into the 
mature valley southwest of Wilkins Run. 
The southeast corner of Eden Township was not glaciated; but 
the front of the ice has not been traced in detail through this township, 
nor into Fallsburg. A small portion of the northeast corner of Madi- 
son Township was not covered by ice. The outline of the drift in 
Hanover Township is considered in the following section. South- 
ward into Hopewell Township the margin of the ice has been traced 
in detail for only a short distance. 
VALLEY DEPENDENCIES 
At Wilkins Run.—A tongue of ice about one and seven-tenths 
miles long reached eastward from Wilkins Run. This village lies at 
one side of a mature valley which once embraced in its drainage the 
area east and north, the region now constituting the headwaters of . 
the Rocky Fork; this defunct valley opened westward into the valley 
of the North Fork of the Licking River, and belonged to the ancient 
Newark River. | 
t Since the government has not issued a map of this area, the writer, appreciating 
the difficulty that one not acquainted with the region would have in visualizing the 
topography described in the paper, has attempted to represent in contours the relief 
of the section about Hanover. No traverse work was done; county surveyor’s maps 
were used for the highways and horizontal distances, an attempt being made to correct 
the grosser errors. It is felt, however, that the altitudes in reference to the arbitrary 
bench mark selected have been established with greater accuracy. For this purpose 
two aneroids were used; these instruments are of the same make, and for over a 
year have shown the same variation when together. During the progress of the field- 
work the aneroids were set the same at the bench each morning; the one kept at the 
bench was read every thirty minutes. The time at which readings were made on the 
other instrument in the field was recorded; the watchers were also set alike each morn- 
ing. At night the field readings were corrected for the variations shown by the bench 
aneroid. Many critical points were checked several times. 
2 The Glacial Boundary in Ohio, Geological Survey of Ohio, Vol. V (1884), p. 755. 
3 Loc. cit., p. 260. 
4W. G. Tight, Professional Paper No. 13, U. S. Geological Survey (1903), p. 18. 
