i8o 
ALASKA GLACIERS 
4 ing. The valleys be- 
« tween promontories 
| of the mainland are 
J U-troughs. The steep 
^ hill back of the village, 
•g a mass of slate, is 
J> smoothed and fluted 
> on a grand scale, its 
original topography 
being so completely 
Js remodeled that its 
< drainage seeks new 
•g routes and is engrav- 
cd 
| ing narrow canyons 
« across the rounded 
1 slopes (fig. 87). 
1 Northwest of this hill 
| * stands a higher ridge, 
Q N 
8_ jS where the upper limit 
oj of ice-rounding is seen 
§* to be about 3,000 feet 
«| above tide, and where 
p. / 
•S g several hanging val- 
| * leys overlook a finely 
3 2 sculptured trough (fig. 
3 | 88). It is evident that 
\ £ a confluent ice-sheet, 
| * enveloping all but the 
I •§ highest summits, here 
«^ flowed to the north- 
| 2 east, with a thickness, 
I 3 along the present coast 
g M line, of 2,000 to 3,000 
13 feet. No important 
% a masses of drift were 
^ bo 
3 seen. 
& 
