i8o 



ALASKA GLACIERS 



I ing. The valleys be- 

 S tween promontories 

 | of the mainland are 

 - U-troughs. The steep 

 | hill back of the village, 

 g a mass of slate, is 

 smoothed and fluted 

 on a grand scale, its 

 original topography 

 being so completely 

 remodeled that its 

 drainage seeks new 

 routes and is engrav- 

 ing narrow canyons 

 across the rounded 

 slopes (fig. 87) . 

 1 Northwest of this hill 

 | ^ stands a higher ridge, 

 | where the upper limit 

 o j of ice-rounding is seen 

 * to be about 3,000 feet 

 above tide, and where 

 several hanging val- 

 leys overlook a finely 

 sculptured trough (fig. 

 88). It is evident that 

 a confluent ice-sheet, 



* enveloping all but the 

 3 highest summits, here 

 & flowed to the north- 



* east, with a thickness, 

 1 along the present coast 



line, of 2,000 to 3,000 

 8 feet. No important 

 I masses of drift were 



seen. 



si 



II 



