over the New Haven Region. 353 
Ascutney there appears to have been some southward deflection 
of the upper or southeastward stream by the valley flow, for the 
direction of transport across is in part only 8° east of south; 
yet the differences of direction observed (p. 351) may have been 
due to the height on Ascutney from: which the bowlders were 
taken, whether within the range of the lower current, or near 
the limit of the two, or far above it. About Amherst the evi- 
dence from bowlders proves clearly that the upper ice-stream 
Continued quite across the valley. In central and southern 
Connecticut, the valley has a breadth of 25 miles; and positive 
proof that the upper current continued across has not yet been 
found. The distribution of bowlders indicate a flow half way 
across, and probably farther; but whether the upper ice did 
not finally in the eastern half lose its own motion and take that 
of the lower for the remainder of the breadth of the lower 
Stream is yet to be ascertained. Such an event could not have 
happened unless the valley-flow succeeded, by its rate of dis- 
charge, in taking the southeastward slope of the overlying ice 
ut of it, so that the only surface slope along this portion was 
I the direction of the valley; and were this done, the valley 
Movement would have necessarily become the only one. Even 
if this were a fact, the slope of the ice-surface east of the eastern 
border of the Connecticut trough would have been southeast- 
Ward, and so also the course of movement. | 
a. Great deflections in the courses of the transported bowlders 
within the valley took place on account of their sinking from the 
Upper or general current into the lower or valley stream. In this 
Way, as happens in the ocean, the lower current became the 
transporter and distributer of material derived from the upper. 
Was supplied with stones from the northwestward and carried 
them southwestward. : i 
This fact is abundantly and strikingly illustrated in the dis- 
tmbution of the bowlders of gneiss. In the New Haven region 
oy. the valley ice-movement, whose direction there was 
i °_96° : 
ver this portion of the declivity, south of Wintergreen Lake. 
A few hundred yards south of the lake, one of the bowlders, 
Connecticut must, beyond question, have passed th 
of the West Rock. i hdr hi between 400 and 650 feet in 
height—while in the upper stream of the glacier; for in no 
Other way could they have got to the east side of the ridge ; 
