728 /. H. OGILVIE 



the glacier, the glacier itself being confined to the southeastern side of 

 the upper end of the valley. This glacier closely resembles the 

 Victoria, but has a few points of difference. The cliff glaciers 

 which feed it are on the southeastern side of the valley. Opposite 

 these cliff glaciers, on the northern side, are talus-covered slopes. 

 The talus also apparently occupies a portion of the valley bottom, 

 and here meets some old and very angular debris. A small lake 

 occupies the valley bottom at an elevation of about 7,000 feet. It 

 is surrounded by talus and. debris on three sides, the fourth being 

 the rock of Mount Pinnacle. This lake appears to be fed by a sub- 

 talus inlet, the greater part of its water coming from the side of the 

 glacier. This glacier, then, is fed not only at its end, but from its 

 southern side, and water issues not only at its front, but at points 

 along the northern side. 



Its surface is covered with debris more deeply than that of the 

 Victoria glacier. The rock masses are remarkably angular and 

 often of great size. In several places piles of debris have accumu- 

 lated, protecting the ice beneath and forming rock cones. 



This glacier is remarkable in that it is advancing,;' both down 

 the valley and also laterally on its northern side. For the lower 

 mile of its course it is now overriding a large forest. Unfortunately, 

 no data are on record concerning its rate of advance or its rate of 

 motion. 



In a pamphlet on glaciers Mr. Vaux remarks concerning this 

 glacier: "At some date, not very remote, an unusual avalanche 

 of rocks of enormous proportions has buried the ice deep in piles of 

 huge stones and bowlders which, preventing the access of the sun's 

 rays, protect it from much melting." It is hardly necessary to postu- 

 late an unusual avalanche. The cliffs south of the glacier are tre- 

 mendous, and the rock, a thick-bedded limestone, weathers along 

 its joint planes into large rectangular blocks which are continually 

 falling to the glacier below. In this weathering process not only the 

 cliff glaciers, but also gravity and the great daily range in temperature, 

 are effective. 



The fact that the glacier fills only the southern part of its valley 

 seems due to the same cause that leads to the diagonal fronting of 

 the Victoria glacier. The ice is shaded by high cliffs on the east and 



