Domes and Dome Structure. 219 



Explanation of Plates. 



Plate XXIX. — Fairview Dome. 



This dome, sometimes called Tuolumne Monument, is in the 

 Sierra Nevada, west of Tuolumne Meadows. In common with 

 the surrounding country, it is of granite. It stands at the edge 

 of a plateau, its summit being 800 feet above one base and 1,300 

 feet above the other; it is not above timber-line, but is bare of 

 trees, because in the absence of joints they get no foothold. 

 Pleistocene ice covered it, flowing from right to left and from 

 distance to foreground. 



Plate XXX. — Dome Structure in the Yosemite Region. 



Figure i. — Half -Dome, at east end of Yosemite Valley, seen from 

 the south ; from a photograph by C. D. Walcott. 



The view shows the convex side of the dome, in which 

 the structure closely parallels the surface. The height 

 above the nearer base is about 1,500 feet ; above the farther 

 base at right goo feet. The dome was covered by Pleisto- 

 cene ice, which moved from the right and from the distance. 

 The surface is treeless, because devoid of joints. No rock 

 but granite is visible in the view. 



The text contains a cross-profile of the dome. 

 Figure 2. — Part of the southeast wall of Little Yosemite Valley, 

 showing dome structure. 



The rock is granite. The valley is deeply incised in a 

 plateau of relatively mature topography. Pleistocene ice 

 covered everything shown in the view except the distant 

 crest, but the glacial degradation of the upland was slight. 



In the upper parts of the cliff the dome structure paral- 

 lels the surfaces of the upland topography; lower down it 

 parallels the cliff face. 



