U..S. GEOLOGICAL SURVEY BULLETIN 845 SHEET 29 
us 17°30" California 
pa, 
Scale 500,000 
linch=8 miles (approximately) 
= ie} 15 20 MILES 
Q iS 20 KILOMETERS 
5 10 
Contour interval 200 feet 
The distances from New Orleans, La., are shown every 
10 miles, and the crossties are drawn 1 mile apart 
Each quadrangle shown on the map with a name in parentheses 
in the lower left corner is mapped in detail on the U. 8. G. S. 
opographic map of that name 
20 te 
Wie 
Saae R 
~! nf BES 
EXPLANATION 
A> Sand and gravel (alluvium and ine and str ter ) Quaternary 
C Sandy shale; some sand- F Jo group 1 con Pleistocene and 
iff) stone and conglomerate is in Pliocene 
gn? Cajon Pass 
page orsd j(A° BsLava, tuff, and diabase * Miocene } 
e pyecun inst ort entails = 
Seal Beach D Shale, sandstone, and Puente (Modelo to the west) ] ae 
oO conglomerate and contemporaneous beds = 
in Cajon Pass ; — 
Hl : + Miocene e 
a I E Sandstone and clay Topanga and Vaqueros j = 
rm ( Miocene) and Sespe | & 
ames. S. Jed fault (Oligocene and Eocene) i 
ge = Sandstone and shale Tejon and Martinez Eocene 
small areas in Cajon Pass are 
F< included in D : : : : 
Shale, sandstone, and Chico formation Upper Cretaceous 
jomerate 
G Granite, schist, slate, ete. Pre-Jurassic 
H Marble (larger masses only) [i Carboniferous (?) 
Geology by W. A. English, W. S. W. Kew, H. W. Hoots, and others a eke | 
San Andreas fault-Cajon Pass region by L. F. Noble TORRANCE *... Oil fields of coastal plain | 
ue” 11730" 
WILLIAMS & HEINTZ CO.. WASH., 0. C 
Topography: U. S. Geological Survey quadrangle maps 
