ILLUSTRATIONS 35 



Explanation of Plates 



Plate 1. — 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 timberline, 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 2. — Dome Structure in the Yosemite Region 



Figure 1. — 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 struct- 

 ure closely parallels the surface. The height above the nearer 

 base is about 1,500 feet ; above the farther base at right 900 feet. 

 The dome was covered by Pleistocene 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 every- 

 thing 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 parallels the sur- 

 faces of the upland topography ; low T er down it parallels the cliff 

 face. 



