STRUCTURE AND CONDITIONS AFFECTING PRESENCE OF OIL. 87 
SOLOMON HILLS AND AREA NORTH OF LOS OLIVOS. 
GENERAL FEATURES. 
Three anticlines dominate the structure of the Solomon Hills. 
These are, in order from west to east, the Mount Solomon anti¬ 
cline (first worked out and named by W. W. Orcutt), the Gato Ridge 
anticline, and the La Zaca Creek-Lisque Creek anticline. In addi¬ 
tion to these there are at least three or four minor anticlines associ¬ 
ated with the first named, and at least one north of that on Gato 
Ridge. 
MOUNT SOLOMON AND ASSOCIATED ANTICLINES. 
Structure .—The details of the northwest end of the Mount Solo¬ 
mon and associated anticlines are shown on the contour map (PI. X, 
p. 92). Whether or not the anticline extending through the Santa 
Maria Oil and Gas and the Escolle properties should he considered 
the true extension of the Mount Solomon anticline, or whether the 
Hartnell anticline should be so considered, is impossible to decide 
with the data at present available. It is the writers’ opinion that 
the Mount Solomon and Hartnell anticlines are the result of the same 
set of forces and should therefore be considered as one fold, but that 
the evidence offered by the data used in compiling the map favored 
the relations shown on PI. X. The mapping of the Pinal, Hobbs, and 
Newlove anticlines is based almost entirely on evidence furnished 
by the drill, although certain superficial evidence strengthens the 
theory of their presence. 
The southeastern portion of the Mount Solomon anticline gradu¬ 
ally fades out into the southern flank of the Gato Ridge anticline, 
losing its individuality toward the southeast end of the Mount Solo¬ 
mon ridge. The northeastern flank of the anticline is much the 
steeper, dipping from 20° to 38° in the region of Mount Solomon, 
and gradually flattening out from that locality southeastward. 
The Western Union anticline is a well-developed flexure with 
steep northern flank just south of the eastern group of Western 
Union wells, but its identity becomes more and more obscure as it 
fades into the southwestern flank of the Gato Ridge anticline in a 
similar manner to the Mount Solomon anticline, just south of the 
latter’s southeast end. 
The relations existing between the Mount Solomon and Schu¬ 
mann anticlines are vague, although it is certain that they are not 
in alignment and therefore can not possibly be one continuous feature. 
If the Hartnell and Mount Solomon anticlines are considered as one, 
the relations which exist between this united anticline and the Schu¬ 
mann anticline are exactly analogous to those which exist between 
the Mount Solomon and Gato Ridge and the Gato Ridge and La 
