TERRESTRIAL DEPOSITS OF OWENS VALLEY 



729 



2. The constituents have not a great range in size. In place 

 of large bowlders, the coarser materials are large-sized cobbles or 

 very small bowlders. Texturally, the fine material is sand or clay. 

 The average size of particles is probably less than half an inch in 

 diameter. Bowlders even as large as 1 ft. in diameter are wanting. 



In the Sierra bajada the pieces of rock are either ice-shaped, or 

 they are almost as angular as when broken off by weathering. 

 Here the effects of glaciation are not seen. The fragments have 

 been worn to pebbles, few sharp or irregular edges appearing. 



Fig. 19. — Close view of the older deposits east of Citrus. Note the layered 

 structure and the dip of the beds. 



They are in general well rounded, having been shaped by the action 

 of water. 



3. These materials are arranged in definite, continuous layers of 

 gravel and sand. The layers can be traced the whole length of the 

 various outcrops as beds of nearly uniform thickness. East of 

 Citrus a definite, continuous layer of clean, fine gravel, uniformly 

 2 ft. thick, overlies a layer which is a mixture of small angular frag- 

 ments, sand, and clay. Northeast of Mt. Whitney station the 

 talus from a deep cut is of uniform-sized cobbles and sand. The 

 stratification of this material may be seen in Figs. 18 and 19. 



Wherever exposures were seen east of Citrus, the beds have an 

 appreciable westward dip (away from the mountains) . Clinometer 

 readings vary between 8° and 18 . The direction of dip is nearly 



