LOS ANGET.ES DISTRICT : WESTERN FTELD. 
Iloover streets, and is one of considerable fracturing and distortion, as 
is evidenced by the dips which occur in its vicinity. Northwest of the 
disturbed area the strata along the southwestern limb of the anticline 
are inclined at angles of 20°-25°, S. 20°-25° W. As the beds approach 
the axis they flatten out, passing gently over it into the low local 
folds and flexures which characterize the rolling country to the north, 
not only of the western, but of the central field also. (See fig. 14.) 
The Los Angeles anticline is complicated by faulting in this field, 
as it is in the region to the east. This is well shown by an exposure 
on First street, one block east of Vermont avenue, where the beds are 
much distorted and broken up. From this point the line of disturb¬ 
ance passes near the junction of Rosedale avenue and the old Holly¬ 
wood and Cahuenga Valley Railroad; thence, as shown by well rec¬ 
ords, across Western avenue at a point somewhere less than a quarter 
of a mile north of Temple road, and thence into the group of wells 
which lie about a quarter of a mile northwest of the corner of Western 
avenue and Temple road. A new line of disturbance, probably a 
fault and doubtless related to the Salt Lake flexure (see p. 194), is 
encountered in this last-mentioned group of wells and extends in a 
northeast-southwest direction across the trend of the anticline. The 
geologic conditions are different on the two sides of the fault line, and 
from this it is safe to assume that the structural conditions are also 
different, but just what effect the fault has had on the main anticline 
is problematical. Evidence offered by the logs of the Colegrove 
group of wells and of other wells between this group and the Salt 
Lake field and by the great monocline in the region of Cahuenga Pass, 
in the Santa Monica Mountains to the north, appears to indicate a 
northwestward extension of the anticline past the transverse fault, 
toward the mouth of Laurel Canyon. A glance at the geologic map 
of the western field clearly demonstrates that most of its structural 
features are determinable only by a comparison of the well logs. It 
has therefore been necessary to depend almost entirely on these logs 
in working out the structure of the great southwestern limb of the 
Los Angeles anticline. In the area southwest of the Baptist College, 
where the anticline recovers from the distortion and fracturing 
accompanying its change of strike farther east, this southwestern 
limb (or monocline, as it may be considered in this territory) dips at 
angles of 20°-22°, S. 20°-30° W. The dip near Western avenue and 
Temple road is a little more toward the south, and, being nearer the 
axis, is but about 12°, while half a mile to the southwest the dip is 
approximately 26°. One-lialf mile farther west the slope flattens out 
to 23°, and still farther northwest, in the area southwest of the Cole- 
grove group of wells, it is' only 22°, continuing practically at this 
angle, at least so far as its southwestern element is concerned, to the 
Salt Lake field. Evidence secured in this field indicates that a local 
