master joints occur. These joints are often quite wide and 



form veritable lines of weakness. In fact the peculiar 



slopes of the Eagle Peaks, the Cathedral Rocks (Fig. 3) 



Fi 4 and some other crags, 



| Whs;.-:: v reach the 6,000 fee 

 I ,„ *„ m^ 



Yosemite Valley and Falls fr< 



A B— Yosemite Falls, 2,600 ft. high 

 C— Glacier Point, 3,200 feet above 



