TERRESTRIAL DEPOSITS OF OWENS VALLEY 



721 



equal frequency, in the same position relative to the stream and 

 to the surface of the fan. 



5. Material is exposed on the Mt. Whitney trail through the 

 Alabama Hills. It is composed of rounded or partly rounded 

 granitic bowlders, up to a foot in diameter, with a sparse matrix 

 of granitic pebbles. Though stratification is not apparent, all 

 material is clearly water laid (Fig. 12). 



6. On Dietz Creek, just above its junction with Tuttle Creek, 

 material is exposed. It is a mixture of very fine angular fragments 



Fig. 11. — Unstratified material on George Creek. This section occurs within only 

 a few feet of that shown in Fig. 10. 



with material having the texture of coarse sand. The fragments 

 are not so angular as pieces just broken by weathering. They 

 seldom exceed a half-inch in diameter, and the average is about 

 y 1 ^ of an inch. The finer material consists of arkose, flakes of mica, 

 grains of pyrite, and of ferro-magnesian minerals, being almost as 

 common as quartz. The coarse and fine materials are unassorted. 



From these descriptions and photographs, the following charac- 

 teristics of the materials are shown: 



1 . The material was derived from the rock of the Sierra Nevada 

 Mountains. 



