80 SANTA MARIA OIL DISTRICT, CALIFORNIA. 
anticline which should yield good returns if penetrated deep enough. 
This anticline is mentioned further in connection with the Canada 
del Gato a area (pp. 88-89). 
REGION OF SANTA YNEZ MOUNTAINS. 
AREA SOUTH OF LOMPOC. 
South of the Lompoc Valley, the Monterey dips in general north¬ 
ward away from the higher portion of the hills, but south of the 
town of Lompoc is an area of much disturbance, and many folds 
have been developed on the flank of what may be thus broadly con¬ 
sidered as a monocline. These folds have been compressed in dif¬ 
ferent directions and there is a puzzling diversity of dip and strike. 
There are so many local folds that it is difficult to connect the more 
important axes, but the general lines of disturbance are continuous 
for the distance mapped. The main folds south of Lompoc are an 
anticline near the valley and a syncline north of the Monterey- 
Vaqueros contact, with a minor anticline and syncline between. 
The attitude of the beds is extremely variable, the dip ranging in 
general between 15° and 60°. On either side of the main anticline 
between Salsipuedes and San Miguelito creeks the hard shales dip 
away at an angle of 20° to 40°. West of San Miguelito Creek the 
folds swing out toward the valley dr die out on the flank of the mono¬ 
cline, which thus becomes unbroken. 
The greater part of the strata in the hills south of Lompoc belong 
low in the Monterey formation, although higher portions remain in 
the synclinal folds. The disturbance has been considerable, and 
erosion has removed the highest parts of the formation, so that the 
chances have been good for the escape of any oil that may have 
been present. There are no surface indications of petroleum and 
the conclusion is that no great quantity of oil would be found on 
drilling. 
AREA OF SANTA RITA HILLS. 
East of Lompoc the lines of structure cross the Santa Ynez Valley 
into the Santa Rita Hills. These hills are formed of a single main 
ridge which is paralleled on the south side by an important anticline. 
The dips on either side of the broad summit of this fold range from 
a few degrees to about 35°. The general trend of the fold is east and 
west, in conformity with that of the Santa Ynez Range, but it is 
curved, especially at the east end, as if influenced by more than one 
set of forces. Other important folds occur on the flanks of the anti¬ 
cline, giving origin to the disturbed zone followed by Santa Ynez 
River. 
a Called locally Cat Canyon. 
