Pleistocene Geology of Moravia Quadrangle 
341 
Montville by way of the flour mill has for a short distance a sharp 
grade up over the south wall of the present stream, then relatively 
a gentle grade the rest of the way; this latter part of the course is 
a deserted channel. While I have not attempted a final study of 
these channels, one hypothesis is as follows: The stream is now 
following, in part of the course from Montville, an inter-glacial 
route which came into use again early in the post-Wisconsin inter- 
val by a minor tributary gradually working its way back from the 
floodplain at Moravia, removing the delta gravels, etc., till it 
captured the drainage that had been flowing through the channel 
now deserted. That this channel, now followed by a highway, 
is of post-Wisconsin origin is believed because it contains neither 
till nor delta gravels; it is possible that stream work since the last 
ice-invasion has disclosed a channel carved earlier, but not very 
probable. 
About one mile south of Moravia is Dry Run, which rises near 
Lickville. For a mile in the lower part of its course this stream 
occupies a narrow rock-walled gorge; up-stream, the valley is 
more mature. Just south of the gorge segment is a wider, partly 
buried, rock-walled channel now occupied by a slight creek; the 
highway runs near this deserted course which has several char- 
acteristics indicating inter-glacial origin. This latter chamiel 
appears to correlate with the wider part of Dry Run valley, but 
no attempts were made to trace the buried portion. 
(4) Those of Post-Glacial Carving. All the present gorge- 
cutting on this quadrangle is but a continuity of erosion that has 
been in force since the withdrawal of the Wisconsin ice. Along 
the Moravia Inlet valley, commencing at the Freeville end, we 
find the first of these post-glacial gorges at Peruville. This is a 
short and rather shallow gorge in the lower formations of the 
Chemung rocks. It is very probable that much of this gorge-cut- 
ting work here represented was accomplished even while the ice 
was near at hand. The torrential aspect of the stream is evi- 
denced by the existing alluvial fan that is built out into the main 
valley at Peruville, a fan that is out of proportion to the drainage 
area controlled by this stream. Therefore the suggestion that 
the fan and the gorge represent abnormal drainage conditions. 
Proceeding northward through the inlet valley the side walls 
are so deeply buried beneath glacial drift, and the catchment 
basins of the creeks so limited, that post-Wisconsin time has but 
