u.s. geological SURVEY 
CHARLES D. WALCOTT, DIRECTOR 
BULLETIN NO.309 PL.XVIII 
LEG EN D 
Geology by Ralph Arnold 1905. 
17 
7opography by U S. Geological Survey, 1894. GEOLOGIC MAP OF the REGION OF THE Eos ANGELES OIL FIELDS , CALIFORNIA F »'~ ~ 
Scale 625oo 
1 
? kuometers 
3 miles 
Contour- interval 50feet. 
Datum w ufiin *en U v ,q 
1906 . 
118 15 
Alluvium and (juatfnwry 
‘i rave I, sand, and clav 
r 
Fernando formation 
Conglomerate, 
sands tone, and slmle 
Sandstone 
(vippermost oil bearing) 
interbedded withMiocene shale | ^ 
in 
In J 
S' 
W, 
Shale,loiter portion 
sili ceous, upper portion 
arenaceous 
o 
UJ 
w 
o 
W 
X 
D | 
Q. 
i O 
C 
o 
Id UJ . 
Ctc< 
0- 
5 
b 
< 
i 1 
hr 
u 
uJ 
2 
Id 
z 
to 
(d 
3 
oJ 
o 
o\ 
u 
- 
z 
o 
o 
w 
D 
z 
i o 
o 
H 
UJ UJ 
Ctu 
0- C. 
D 
_l 
b 
cc 
CL 
o 
Puente sandstone 
Sandstone interbedded 
with. shale 
Black SC hist 
Diabase and. basalt 
Granitic rocks and 
gneiss 
0 il well s 
Brea 
Fault 
.Anticline 
Syncline 
Dip.s 
