346 
Frank Carney 
lines of which they are tributaries, or to the work of an abnormal i 
quantity of water which their valleys carried in immediate post- 
glacial times. Such channels, where topographic adjustment is 
in progress, exist at Peruville, a few between Locke and Moravia, |i 
at Montville, and in the short tributary valley south of Dresser- l! 
ville. 
The base-level of the present Owasco Inlet valley is Owasco I 
lake, which is 464 feet above the level of Lake Ontario. The base- 
level represented by Lake Ontario is far removed from becoming ; 
active in the drainage degradation of the quadrangle. Fall Creek, | 
a tributary of the Cayuga valley over the eastern wall of which it jj 
now drops^ at Ithaca, controls a large portion of the Moravia jj 
quadrangle. But the base-level represented by the water in |i 
Cayuga valley initiates a new drainage cycle for such parts of the | 
quadrangle as are drained by Fall Creek. A recent cycle is also ' 
in operation for the valley tributary to the Owasco Inlet at Mor- ll 
avia. In all other respects this quadrangle occupies a prema- I 
turely advanced stage in its drainage cycle. The former major i 
drainage line, that is, the valley now controlled by the Owasco I 
Inlet, in its southern part has been so aggraded by glacial deposits j 
that many of the streams which preceding the ice invasion were I 
doing erosional work have in the main ceased to be agents of dis- 
integration. This glacial interference with the erosion cycle is i 
the same in kind as has become operative in all of these Finger 
Lake valleys. It becomes apparent, therefore, that one of the 
results of glaciation is the hastening of the position which drain- | 
age in its normal development would have brought about. On 
the other hand, certain upland valleys contiguous to these major 
drainage lines have been started on an entirely new cycle through i| 
the erosive work of ice in the longitudinal valleys to which the 1 
upland valleys were pre-glacially graded. | 
Distribution of the Drift. 
GENERAL DISCUSSION. 
In accounting for the veneer or for the deeper accumulations of i: 
drift found in glaciated countries, one considers both the local 
topography and the topographical aspect of probably all the area [ 
^ R, S. Tarr: Am. Geologist, vol. xxxiii (1904), pp. 271-91. 
