* 
. terminal moraine. Within 
South of the Terminal Moraine. 281 
stone not yet separated. I hammered down some of these 
blocks and found the slickensides quite as well marked on the 
inner surface of the block just detached as they were on the 
vertical wall. This locality is over sixty miles south of the 
terminal moraine. 
(3.) When studying the limits of glaciation in 1880 and 1881, 
I was aware of the statements that had been made concerning 
glacial action at the Wind Gap, and took special care to exam- 
ine that locality thoroughly, particularly as it lies so near the 
in three miles of the gap, glaciation 
is proved by undoubted evidences. Scratched and transported 
bowlders, some of them of Adirondack granite, polished and 
striated rock surfaces, unmodified ¢éll, glacial lakes, kames and = / 
moraines, are all close at hand, but all stop suddenly at a point | 
less than three miles away. I did not see a single scratched or 
transported bowlder in the gap, nor any strise or other signs of 
glaciation. A long trench made for a projected railroad had 
been cut in the bottom of the gap, offering an excellent 
pportunity to study the character of tlie debris at that place. 
It presented no evidence of glacial action. The fragments 
were mostly angular, and composed of the same Medina sand- 
Stone (No. [V) which formed the two sides of the gap. 
had evidently falien there from the mountain. The “smoothly 
rounded slopes” referred to showed no evidence of glacial or 
aqueous erosion, their form being due to the mass of angular — 
frost-broken talus which covers some of the crags, 
North of the Gap, and at nearly the same level, the soil is 
filled with fragments of Clinton red shale and sandstone (No. V), 
fing made of the underlying rock. No rounded or trans- 
pen bowlders were here seen, although cliffs of Helderberg 
imestone and Oriskany sandstone occur immediately north. 
A few miles to the northeast, however, in the glaciated region, 
large blocks of both of these formations are strewn in abun- 
ance along the northern flank of the mountain.” 
Nor could any “ fan-shaped sloping plain of rounded bowlder 
drift” south of the gap be discovered. It is true that the 
T have been able to trace the course of a wide river, which, 
Same time there was a large sub-glacial drainage backward to 
Portland, as shown by the Portland kame." The bowlders and 
'2 V. Report Z, p. 88. 8 Z, p. 69. ‘ 
