678 THE JOURNAL OF GEOLOGY. 
before described; in other words the two glaciers, instead of 
fusing, flowed side by side, crowding upon each other mutually 
and developing this zigzag line of junction. In addition to this 
very notable and unusual distortion, and in addition to the 
faulting and drag there were, at not a few points, twisted and 
contorted laminations indicating varying stresses and differential 
rates of motion. 
Fic. 50.—Sketch intended to illustrate the remarkable zigzag course of a dark 
layer thickly set with pebbles and bowlders on the south side of the South Point gla- 
cier. The upper line of the sketch represents the upper edge of the wall of the glacier 
and the bottom its base. 
On the south side of the glacier a stratum was observed 
thickly set with bowlders in very much the same manner as the 
stratum that formed the. talus in front. The aneroid indicated 
that this was about 400 feet higher than the débris layer in 
front. Its distance back from the front unfortunately was not 
measured, nor was it traced continuously along the side and 
shown to be identical with the layer in front, but there seemed 
little ground to doubt that it was the same, and if so, it is 
worthy of note as indicating the rapid descent of the débris- 
bearing layer harmoniously with the descent of the entire glacier. 
The upper edge of the glacier was measured at a point not far 
above this and found to be about 550 feet above the base in 
front. 
In respect to the interesting question of recent change in 
the extent of the ice, the evidence of the South Point glacier 
seemed very clear so far as it went. It has been remarked that 
between the glacier and the bay the valley was occupied by gla- 
cial wash. Inthe middle and northern half of the valley this 
was recent, but in the southern portion there was a terrace ele- 
