. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. r portions of the Coast Range and withhe Sierras. After a westerly course of 75 miles the stream whichIrains the valley enters the Pacific a little south of the town ofCentura. The valley proper is given over to agriculture, but inhe mountains on either side are many important oil fields. The mountains north of the valley form the watershed betweent and the Central Valley of California and also present a barrier to/he Mohave Desert, which lies in the angle between the Sierrask
. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. r portions of the Coast Range and withhe Sierras. After a westerly course of 75 miles the stream whichIrains the valley enters the Pacific a little south of the town ofCentura. The valley proper is given over to agriculture, but inhe mountains on either side are many important oil fields. The mountains north of the valley form the watershed betweent and the Central Valley of California and also present a barrier to/he Mohave Desert, which lies in the angle between the Sierrasknd the more southerly ranges • of the State. These mountains are I OIL DISTRICTS OF SOTJTHEKN CALIFORNIA. excessively rugged and represent the convergence of several ranges,which to the northwest maintain a conspicuous individuality. TineMountain, which is 7,488 feet in altitude, is their culminating poindThe area thus occupied forms a part of the Santa Barbara ForestReserve, recently set aside by the United States Government. Thegreater portion of it is accessible only by trail and is almost Fig. 1.—Index map of a portion of southern California, showing the location of the three districtsdescribed in this bulletin and of the other important producing districts of the State. The San Gabriel Range, in which rise the southerly heads of Santa(Lira River, equals in ruggedness and general altitude the moun-tains to {lie north. This range, with its western extension, theSanta Susana Mountains, separates the Santa Clara Valley fromthose of Los Angeles, Tujunga, and San Gabriel rivers, while stillfarther west Oak Ridge and South Mountain, in extension of the U. S. GEOLOGICAL SURVEY aJSttBfc^£«>« ^?>-.,. &y^Bt* ??l?l_mi» ^^•*\!?Sf^; .1. PANORAMA ACROSS HOPPEIFrom Hopperbulletinofunited309eldr
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