. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. Perhaps the most remarkable of all the oil fields of California is anarea of insignificant size in Placerita Canyon, 5 miles east of oil here is almost a naphtha, and its gravity is said to be above 50°.The yield is very slight. The remarkable feature in connection withthe oil is its occurrence in crystalline schist which overlies the SanGabriel granite and which is in turn overlain at no great distance fromthe wells by rocks that are believed to be of the Fernando
. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. Perhaps the most remarkable of all the oil fields of California is anarea of insignificant size in Placerita Canyon, 5 miles east of oil here is almost a naphtha, and its gravity is said to be above 50°.The yield is very slight. The remarkable feature in connection withthe oil is its occurrence in crystalline schist which overlies the SanGabriel granite and which is in turn overlain at no great distance fromthe wells by rocks that are believed to be of the Fernando was discovered in shafting for gold. The schist in which the oil occurs is micaceous and granitic, con-spicuously banded, and greatly contorted. It strikes approximatelyN. 70° W. and dips 50°-80° N. The accompanying diagram (fig. 11)indicates the position of the wells. There are six in all, the three onthe north belonging to the New Century Company and those on the;south to Freeman & Nelson. The New Century wells are nearer the. Fernando sandstone and con-. Plioceneand conglomeratesandstone. Schist o ioo 200 300 feet glomerate, which approachwithin a few feet. It is said Fig. 11.—Sketch map Bhowing location of PlaceritaCanyon wells, 5 miles easl of Newhall. Heavy dots,wells. Figures indicate numbers and depths of wells. that one of these wells spout-ed high and that another ibarely flowed. The deepest Iwell of the six is the southern-Jmost of the Freeman & Nel-; |son group, which attained a,idepth of 1,030 feet. Oil isreported in this well at 410,;613, and 682 feet. It is saidto yield 5 or 6 barrels perday, with 30 or 40 barrels ofwater to each barrel of a tributary of Placerita Canyon, three-fourths of a mile east ofthe wells described above and in the same schist, is the Pioneer well,1,100 feet deep. It struck oil, but the yield could not be granite lies about three-fourths of a mile south of this well. The presence of oil under conditi
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