SOUTHERN PACIFIC LINES 
273 
of relatively recent age geologically, that cross diagonally the axis of 
the general mountain 
range extending z 2 mA fl 
across southern Cali- Pp e49 2 yk 
fornia. These faults de ® a >} fee : 
include the southern of 2 8S 85 TKS) | 
extension of the San 8 ops Se 25 ; 2 
Andreas fault, move- es 9 ge | AA g 
ment along which in §& [%- mae e ae g 
1906 caused the San Hes as = £ 
Francisco earthquake eh £ nya) om s 
They define the north Vos 2 RRinlk 3 $ 
side of the San Gabriel 93 s “128 2 s 
Mountains, and south- Rarer ot 3 . 
east of the pass they SERS S On uber. 2 
extend eastward for rahe < 8 2 © 3 
many miles along the ines 5 5 = E 
south foot of the San aK S & LS "7 8 
Bernardino Moun- 2 . at Sull 
tains. There are sev- ifs VA, 2 POA ° a 3 
eral planes of move- ee g ig a ie | 3 
ment, not far apart, wore ule F § 28 Ly = a8 Ghee 
F: a oD Vee a oo 1S 
with hag slivers, or ee z Ba Yrek|Se | 88) = 
narrow blocks, of S61 ° Ge| 8 lt 148 
schist and soft sand- ae Fi: 5 33 Wr 37] =] 
stone between them. 9 i Br ,., Be Pie 
(See pl. 46, B.) The ay 8 B bye 7 i: 
erosion of the sand- ae) Y o- 2 
uoAUe) Xray aguolog |Z 
stone on the down-  auigewo fs sh § 
thrown blocks is the a2 SS 2 ; 
principal cause of the s8eex BEN | FE 
pass. (Noble.) oS 1 
Near Redlands the % Se== > 
faults present many RS3 
features indicating SS 
recent movement, N y 
notably at one place ee ce : 
where a ravine has 3 bog ‘ 
been offset abruptly - aie 2 s 
The movement was S(¢<'' § Es 
mostly vertical, but © $79 & 
in some of the faults & Oe 
there has been a hori- x 
zontal displacemen . 
For on Tales 2) a strip of Tertiary strata lies on one of the slivers 
