GLACIATION OF WRANGELL MOUNTAINS 



55 



Ptarmigan Lake would normally drain into the White River to the 

 south, but its waters found an outlet by way of Beaver Creek at the 

 time the glacial ice in the White River Valley formed a barrier to 

 drainage in that direction. The development of its gulch by Cache 

 Creek may some day result in the recapture of this drainage, as the 

 gulch is now -being rapidly deepened headward. • 



GLACIERS IN SKOLAI CREEK DRAINAGE 



Skolai Creek is the stream which flows eastward from a lobe of 

 Russell Glacier, and after traversing a narrow, deep valley for about 

 17 miles, is impounded to form a lake at the edge of the Nizina 



Fig. 13. — Terminus of Frederika Glacier. This glacier terminated, in 1891, 

 in an ice-cliff 250 feet high. Photograph by F. H. Mofifit. 



Glacier, and has its outlet beneath this ice-dam. From the north a 

 single ice-lobe, Frederika Glacier, drains into Skolai Creek. C. W. 

 Hayes, who saw this glacier in 189 1, says of it. 



The glacier terminates in a nearly vertical ice cliff stretching across the lateral 

 valley a mile in length, and about 250 feet high. Its surface is free from moraine, 

 but is extremely rough and broken, wholly unhke the surface of stagnant ice 

 at the end of a retreating glacier.^ 



He also mentions this glacier as being the only one seen that summer 

 which appeared to be actively advancing. As seen by the writer, the 



I Nai. Geog. Mag., Vol. IV, 1892, p. 133. 



