3o6 



STEPHEN TABER 



lateral displacement is well defined, as far as it has been traced, 

 and at some points amounts to as much as 9 feet. The vertical 

 displacement in most places is not so evident, but about a mile 

 southeast of Portola there is an upHft of 2 feet on the northeast 

 side, and the same amount of vertical displacement has been 

 observed on Black Mountain. 



The valleys through which the old Stevens Creek fault runs are 

 filled with silt and gravels, so that it is impossible to get at bed-reck 



Fig. 3. — Road crossing the fault-line two miles southeast of Portola. 

 vertical uplift on the northeast side of the fracture at this place. 



There is a 



along the fault-line, but it is probable that the rocks along this line 

 have been so broken and crushed by past movements that they 

 would offer little or no additional information in regard to the recent 

 displacement. 



Through the Portola Valley, and for about 3 miles northwest 

 of Woodside, the fracture runs in a continuous and almost straight 

 line. At a little distance it looks as though a furrow had been run 

 down the valley with a big plow. In places the earth has been 



