Bie THE JOURNAL OF GEOLOGY. 
clear signs of disturbance by any notable movement of the ice 
foot was detected. The characteristic humpy surface due to 
such melting of ice under débris is illustrated in Fig. 20. Here 
the débris seen in the center foreground is chipstone brought 
down from the slope on the right. The ice underlies it entirely 
across the foreground. Farther back and higher up in the left 
Fic. 20.—Phenomena on the southeast border of the Igloodahomyne Glacier. 
The débris from the bluff of sandstone and shale on the right has been washed upon 
the edge of the ice which has been subsequently melted in part, resulting in a char- 
acteristic humpy surface. 
central portion of the figure, an inclined belt of lateral morainic 
material may be seen on the ice slope. Apparently here is the 
decadence of seve-al seasons undisturbed by any sensible motion 
of the ice, a state of practical stagnation. It is obvious that 
the ice border has recently retreated. But this might take place 
with the ice still creeping on at an appreciable rate und with dis- 
turbing effects if the wastage were superior to the advance. It 
