EARTHQUAKE INVESTIGATION 
COMMISSION PLATE 15 





Golden Gate Goat Island 
GEOMORPHIC 







, ort Point AND 
2 GEOLOGIC MAP 
ss n ZS AN FRANCISCO OF THE 
SS SAN FRANCISCO PENINSULA 
BY 
Point Lobos > ANDREW C.LAWSON 



*. 
e 


eh ° 1 2 3 amiles 
eee ee 
BS 






























Adapted from the Fifteenth Annual Report of the 
USGeal gical Survey to show the geomorphic 
S character of the San Andreas Rift,the relation 
- of the latter and of the fault of April 18,1906,tothe 
City of SanFrancisco and the relation of both to the 
geology of the peninsula 
q 
Alluvium and salt marsh 
Hunters Point = 
vn ES 
Pliocene (Merced Series) 
b Pleistocene with derivative | 
sands (dunes) 
E 
Franciscan series 
(Sands tones, shales,for- 
aminiferal limestone 
radiolarian cherts and 
agate Sierra Point ~ eruptives / 
ty 
= Pee 
Serpentine 
Mussel Rock 

> 
> San Bruno | 
Point z 
C 

~ Fault of April 18,1906 
following the Rift 
7 IWS 
cee ER 
Otherfaults 
of ancient date 


ms 
San Pedre "<A “Si San Mateo Point 
Point 
© 
. 
Q 
Seai Cove © 
wT 
JULIUS BIEN & CC NY. 
