X 
ILLUSTRATIONS. 
Page. 
XXIV. A, Characteristic tliin-bedded Pliocene sandstone, Los Angeles oil 
fields; B, Lagoon in the Salt Lake field, Los Angeles, showing 
floating oil and bubbling water caused by escaping gas.•.... 188 
XXV. Eocene Pelecypoda. 223 
XXVI. Eocene Pelecypoda and Gasteropoda. 225 
XXVII. Miocene Pelecypoda and Gasteropoda. 227 
XXVIII. Miocene Pelecypoda and Gasteropoda. 229 
XXIX. Miocene Echinoidea and Pelecypoda. 231 
XXX. Miocene Echinoidea, Pelecypoda, and Gasteropoda. 233 
XXXI. Miocene Pelecypoda and Gasteropoda. 235 
XXXII. Miocene Pelecypoda, Gasteropoda, and Crustacea. 237 
XXXIII. Miocene Pelecypoda and Gasteropoda. 239 
XXXIV. Pliocene pectens... 241 
XXXV. Pliocene pectens. 243 
XXXVI. Pliocene pectens. 245 
XXXVII. Pliocene areas. 247 
XXXVIII. Pliocene Pelecypoda and Gasteropoda. 249 
XXXIX. Pliocene Brachiopoda and Pelecypoda. 251 
XL. Pliocene Pelecypoda and Gasteropoda. 253 
XLI. Tertiary turritellas. 255 
Fig. 1. Index map of portion of southern California. 2 
2 . East-west section across Sespe Canyon above mouth of Tar Creek. 8 
3. North-south section, on north side of Lower Ojai Valley. 9 
4. Sketch map showing location of wells and oil seepages in the northeast 
corner of Upper Ojai Valley. 41 
5. Sketch map showing location of Ivers wells, with relation to anticlinical 
axis in the Sespe red beds. 55 
6 . Sketch map showing location of Kentuck group of wells in syncline 
in Sespe red beds. 57 
7. Sketch map of Foot-of-the-Hills oil wells. 59 
8 . Sketch map showing location of the Fourfork group of wells, with rela¬ 
tion to the base of the upper purple beds... GO 
9. Sketch map showing location of the Fortuna wells, with relation to the 
anticlinal axis. > . 70 
10. Section through Fryers Peak east of Fryer’s ranch. 92 
11 . Sketch map showing location of Placerita Canyon wells, 5 miles east 
of Newhall. 100 
12 . Generalized geologic section for the immediate vicinity of the Los 
Angeles oil fields. 144 
13. North-south section across the central field. 171 
14. North-south section along Hoover street, Los Angeles. 175 
15. Detail of section along line C-D, western oil field. 178 
1 G. Detail of section along line A-B, western oil field. 181 
17. Northwest-southeast sections in Salt Lake field. 189 
