N AN Salt Creek \ 
War Department . 
GEOLOGICAL MAP 
OF THE COUNTRY BETWEEN 
SAN DIEGO AND THE COLOR ADO RIVER 
CALIFORNIA . 
Prepared in Office of PRR Exp 8, Surveys. 
۹ ByW.P.BLAKE 
ScaleL608228. 
"a 1855 . 
U.S.P RR EXPLORATIONS & SURVEYS ۱ | 
\ Salt Pond 
> 
«Soda Springs 
LU 6rarttic. & Metamorphic . 
TEEN ptt Tgp ks. 
| | Lertiary and. Detritus 
LOWER 
CALIFORNI 
x: 5 : 
n f `, Mud Valcano 
[| Alluvial of the Desert . | 
[| Sand Mills and Drifts. = 
MN NE | Ri 
Statute Miles 3 
| de 50 40 — 30 20 10 0 50 
E nz 116 : 
