Yosemite National Park 207 



question whether that high promontory was ever overtopped 

 by the ice. The point of the promontory is bare, but on the 

 slope immediately below the Glacier Point Hotel, and in the 

 hollow to the west, and, what is more significant, on the wooded 

 slope above, glacial material is abundant. The glacial origin of 

 this material is definitely proved by the presence in it of great 

 numbers of rounded boulders and cobbles and angular frag- 



FIG. 64. Storm-scarred Jeffrey Pine standing on the top of Sentinel Dome. 

 It appears as a small speck at the apex of the Dome in figure 63. 



ments, all deeply weathered, of granite of which Half Dome and 

 the heights of the Little Yosemite Valley are composed, also 

 boulders of a coarse-grained and highly distinctive granite from 

 Mount Clark, 8 miles east of Glacier Point. It is evident that 

 these highly distinctive materials were carried to Glacier Point 

 on the southern margin of the ice stream. On the slope above 

 Glacier Point morainal deposits are found up to an altitude of 

 7,700 feet, or 500 feet above the point on the promontory. 



