TERRESTRIAL DEPOSITS OF OWENS VALLEY 



719 



exposures show material which is apparently unstratified. Even 

 where sorted into lenses or irregular areas, there is a considerable 

 mixture of all sorts of material in each division, each merely 

 averaging a little coarser or a little finer than its surroundings. 



All materials are clearly water laid, but under conditions which 

 allowed of very poor sorting. 



The structure and texture of the materials are brought out best 

 by detailed descriptions and photographs. Such illustrations are 

 given below and in Figs. 9, 10, n, 12, and 13. 



Fig. 9. — A section in the Sierra bajada from the south wall of Lone Pine Canyon, 

 ^ mile west of the Cerro Gordo power shanty. 



i . Two hundred to three hundred yards above the power shanty 

 on the south wall of the valley of Lone Pine Creek, wash and gravity 

 have exposed the material almost continuously for a distance 

 of about 100 ft. vertically. The section consists of both fine and 

 coarse material roughly separated from one another. There are 

 two horizons of coarse bowlders, one 20 ft. from the top and the 

 other about 30 ft. from the bottom. In the upper horizon the 

 bowlders are fairly well rounded, and range up to 4 ft. in diameter, 

 the average being about 1 ft. In the lower zone of bowlders there 

 is greater range in size. There are numerous pieces 6 in. through, 

 and several 6 ft. or so in diameter. The sorting is very slight. 

 Between these two horizons the materials are mostly fine, though 

 large bowlders are not entirely absent. Immediately above the 



