LOS ANGELES DISTRICT: GEOLOGIC FORMATIONS. 
143 
North of the Santa Monica Range lies the San Fernando Valley, 
separating this range from the Santa Susana Mountains on the north. 
South of the Santa Monica Range and the Elysian Park hills is the 
broad Los Angeles-Santa Monica plain, which slopes gently south¬ 
ward to the Inglewood hills, southwest of Los Angeles. A physio¬ 
graphic feature which appears to reflect in a general way the under¬ 
lying structure—and if so may be important in determining the loca¬ 
tion of the productive territory—is the gentle declivity extending 
from the middle of the Salt Lake held northwestward toward Sherman. 
GEOLOGIC FORMATIONS. 
Tentative correlation of oil-bearing formations of southern California with the standard 
California geologic section. 
Pe¬ 
riod. 
o 
o 
S3 
c 
G 
<1> 
o 
o 
N 
o 
ca 
a 
Sys¬ 
tem. 
1 
Series. 
Standard Cali¬ 
fornia section.- 
G 
Recent. 
Alluvium. 
Quart 
nary 
Pleisto¬ 
cene. 
San Pedro. 
Pliocene. 
uTTuirhui ifTTTj 
Merced. 
Purisima. 
San Pablo. 
—Unconformity — 
h. 
G 
G 
Miocene. 
Monterey. 
Eh 
Vaqueros. 
Oligo- 
cene 
San Lorenzo. 
— Unconformity — 
Tejon. 
Martinez. 
— Unconformity?— 
Chico. 
Horsetown. 
Knoxville. 
—Unconformity — 
Granitic rocks of 
the Sierra Ne¬ 
vada. 
Eocene. 
Creta¬ 
ceous. 
Jurassic. 
Santa Clara 
valley. 
Sand and gravel. 
- Unconformity — 
Fernando. 
— Unconformity — 
Alluvium. 
Shale. 
Upper sand¬ 
stone. 
2 iLower sand¬ 
stone. 
Vaqueros. 
o3 fUpper. 
Red bed 
$ lLower. 
Topatopa 
Los Angeles. 
Alluvium. 
Sand and gravel. 
- Unconformity — 
Fernando. 
— Unconformity — 
Diabase intrusion. 
Z [Upper shale, 
gt Sandstone. 
3 Lower shale. 
P-i 
(?) 
Puente Hills. 
Alluvium. 
Sand and gravel. 
- Unconformity- 
Fernando. 
— Unconformity — 
Diabase intrusion 
2 [Upper shale. 
Sandstone. 
3 Lower shale. 
Oh 
(?) 
(?) 
— Unconformity — 
Granitic rocks of 
the San Gabriel 
Range. 
— Unconformity — 
Granitic rocks of 
the Santa Mo¬ 
nica Range. 
Black schist. 
