. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. A. LA BREA CANYON FIELD, ORANGE ],. CHARACTERISTIC PUMPING PLANT, WHITTlER FIELD, LOS ANGELES COUNTY. PUENTE HILLS! BREA CANYON FIELD. 121 being particularly persistent. Midway between the base and sum-mit of the hill there is a calcareous pebbly layer, which is also fossil-iferous, yielding a lower Pliocene fauna. The beds forming thelower slope north of the stream, although perhaps not a repetitionof the beds south of the canyon, are unquestionably
. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. A. LA BREA CANYON FIELD, ORANGE ],. CHARACTERISTIC PUMPING PLANT, WHITTlER FIELD, LOS ANGELES COUNTY. PUENTE HILLS! BREA CANYON FIELD. 121 being particularly persistent. Midway between the base and sum-mit of the hill there is a calcareous pebbly layer, which is also fossil-iferous, yielding a lower Pliocene fauna. The beds forming thelower slope north of the stream, although perhaps not a repetitionof the beds south of the canyon, are unquestionably of the sameformation. A small body of limestone a few feet across, together with a littleshale similar to the Puente material, was observed in the Fernandoof Brea Ridge. A similar occurrence was noted near the Unionwells in the La Habra district. Both are unusual and inexplicable. Opposite the entrance to Brea Canyon the Fernando formation issucceeded on the north by shale, thin-bedded sandstone, and cal-careous concretions characteristic of the lower divison of the Puentein this region. A narrow dike of diabase extending in an east-westdirection for nearly a mile intru
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