ILLUSTRATIONS. 
Page. 
Plate I. Geologic map of Santa Clara Valley and adjacent oil fields in Ven¬ 
tura and Los Angeles counties.:. Pocket. 
II. A, View across Hopper Canyon to valley of Piru River; B, The 
great Topatopa anticline, Sespe oil field. 2 
III. Geologic structure sections across Mount Pinos, Tejon, Santa Paula, 
and Camulos quadrangles. 28 
IV. Geologic structure sections across Camulos, Santa Susana, and Fer¬ 
nando quadrangles. 30 
V. Township and section map of the Santa Clara district, showing 
location of oil wells. 30 
VI. A, Flanks of Oak Ridge and the Santa Susana Mountains, show¬ 
ing post-Pliocene peneplain; B, The Upper Ojai Valley. 40 
VII. A, Santa Paula Canyon; B, Elsmere Hill and oil wells, near New- 
hall, Los Angeles County. 48 
VIII. A, Modelo wells, Modelo Canyon, Ventura County; B, Fortuna 
wells, Hopper Canyon, Ventura County. 70 
IX. A, Overturn in Vaqueros formation, west side of Pico Canyon, 
Los Angeles County; B, Pico anticline, Pico Canyon, Los 
Angeles County. 90 
X. Geologic map of the oil fields of Puente Hills. 102 
XI. Geologic sections across the oil fields of the Puente Hills district.. 108 
XII: Township and section*map of the Puente Hills oil district, showing 
location of oil wells. 110 
XIII. A, Wells along Central Oil Company—Murphy Oil Company prop¬ 
erty line, Whittier field, Los Angeles County; B, Productive 
well in vertical strata, Whittier field, Los Angeles County. 112 
V 
XIV. A, Brea Canyon field, Orange County; B, Characteristic pumping 
plant, Whittier field, Los Angeles County. 120 
XV / A and B, Panorama of the Olinda oil field. 124 
XVI. Detailed geologic section through Olinda oil field. 130 
XVII. 1 Chart showing variation in daily production of a group of oil wells in 
the Puente Hills district. 134 
XVIII. Geologic map of the region of the Los Angeles oil fields. 144 
XIX/ Street and section map of the Los Angeles oil fields, showing loca¬ 
tion of oil wells.'. 158 
XX. Geologic structure sections across Los Angeles oil fields, Los Angeles 
quadrangle. 162 
XXI/ A, Nodular Miocene sandstone at Los Angeles; B, Typical lower 
Miocene sandstone at Los Angeles. 166 
XXII. A, Eastern oil field, Los Angeles; B, Central oil field, Los Angeles. 168 
XX11 I/Salt Lake field, Los Angeles. 186 
* 
IX 
