U. S. GEOLOGICAL SURVEY 
BULLETIN 845 SHEET 27 
California _ 9] 
ee 
° NG 16 
He 
EXPLANATION 
A’ Sand, gravel, loam, ete. (valley fill Quaternary 
and lake deposits) ‘ 
B Sandstone, shale, and conglomerate Pliocene 
C Schist, granite, ete. Pre-Cambrian and later 
D  Lavas and tuffs (voleanic) Tertiary and later 
eR Beach of Lake Cahuilla 
a Fault 
~~~= Concealed fault 
Geology, reconnaissance mainly by J. S. Brown, 1917-1918; 
I 
Scale 500,000 
linch=8 miles (approximately) 
= lo 15 
20 MILES 
10 
Contour interval 200 feet 
The distances from New Orleans, La., are shown every 
10m d the ti d 7 mile a, 
iles, and 
I h. th, ooh 
20 KILOMETERS 
part 
j hb 
sy 
in the lower. left corner is mapped in detail on 
topographic map of that name 
6 30 
San Andreas and Mission Creek faults by L. F, Noble, 1932 
the U. 8. 6. 8. 
Topography south of railroad by U. S. 
WILLIAMS & HEINTZ CO., WASH..D.C 
