GLACIATION OF WRANGELL MOUNTAINS 57 



Below Frederika Creek there are several small cliff glaciers on the 

 south valley-wall. At their heads the rock rises almost perpendicu- 

 larly for a thousand feet or more. On a warm afternoon, great blocks 

 of ice from above could be seen to break off and fall down this cliff 

 with a great noise. The ice was broken to fine fragments before it 

 reached a lodgment below. 



