714 ARTHUR C. TROWBRIDGE 



as to make low and discontinuous ridges, which by winding his way 

 among the bowlders one may in some instances be able to cross 

 without climbing. The height of the ridges is determined by the 

 size of the bowlders, and is usually less than 10 ft. They seldom 

 consist of more than two thicknesses of bowlders. 



THE SLOPE OE THE BAJADA 



The slope of the piedmont plain away from the mountains varies 

 rather uniformly with distance from the mountains. It also varies 



: 



Fig. 3. — The slope of the Sierra bajada as seen on the north wall of the canyon of 

 Carroll Creek. 



SPS^Sc^^p^-*^.*;-/. " : 



Fig. 4. — The slope of the Sierra bajada on the south wall of the canyon of Carroll 

 Creek. 



irregularly from place to place along the foot of the mountains. 

 Along Carroll Creek the slope at the face of the mountain is 18 

 and 20 (Figs. 3 and 4). Where it is 20 , the angle decreases to 

 about 12 a quarter of a mile from the mountains; and where it is 

 18 at the mountains, the slope is 6-8° a mile or so out. The fan 

 of Lone Pine Creek has a slope of 6° at the mountains, which de- 

 creases almost uniformly to a very low slope at the west edge of 

 the Alabama Hills. The difference between the slopes of the fans 

 of Lone Pine Creek and Carroll Creek might be due to a diastrophic 

 tilting, which either did not occur at Lone Pine Creek or did not 



