LOS ANGELES DISTRICT : 
SALT LAKE FIELD. 
193 
Locj of well in the eastern part of the SE. 1 sec. 28, T. 1 S., R. If W. (1 mile southeast of the 
lagoon), Salt Lake field. 
[Elevation, 180 feet; dip approximately 20°.] 
“ Adobe ”. 
Sand and a little heavy oil (asphaltum). 
Quicksand. 
Blue clayey shale... 
Hard “shell”; blue limestone. 
Blue clayey shale. 
Hard “shell”; blue limestone. 
Blue clayey shale.... 
Hard “shell”; blue limestone. 
Blue clayey shale. 
“River” sand; some oil. 
Clayey shale. 
“ River” sand having excellent quality but small quantity of light oil 
Clayey* shale.. 
Hard shell; blue limestone.. 
Clayey shale.. 
Thick¬ 
ness. 
Depth. 
Feet. 
Feet. 
28 
28 
100 
128 
45 
173 
127 
300 
4 
304 
226 
530 
4 
534 
166 
700 
6 
706 
229 
935 
5 
940 
300 
1,240 
5 
1,245 
55 
1,300 
15 
1,315 
81 
1,396 
Log of well in the western part of the N W. J sec. 28, T. 1 S., R. If W. (/ mile south-south¬ 
west of the lagoon), Salt Lake field. 
Thick¬ 
ness. 
Depth. 
Sandy clay. . 
Feet. 
90 
90 
325 
358 
Feet. 
90 
180 
505 
863 
Water sand containing heavy oil (asphaltum). 
Heaving sand (gas); little water; no oil; carries considerable quantities of pebbles.. 
Blue clayey shale interhedded with beds of sand and pebbles 1 foot or so in thickness 
carrying oil; richest horizon at about 700 feet. 
STRUCTURE. 
Owing to the almost complete absence of surface evidence in the 
immediate vicinity, the determination of the local structure in the 
Salt Lake field depends largely on the interpretation of the well logs. 
Unfortunately, not all of these were available at the time of the 
writer’s visit to the field, so that the conclusions reached, although 
probably correct in the main, lack that detail and definiteness which 
is so desirable in an economic report of this sort. 
The strictly local structure of the field under discussion will be 
more fully comprehended if its relation to the general structure of the 
Los Angeles district as a whole is again briefly outlined. Practically 
all the productive oil sands of the different Los Angeles fields lie on the 
southern limb of a flexure, usually a more or less well-defined anti¬ 
cline, whose axis extends in a westerly direction to the region approx¬ 
imately half a mile north of Westlake Park, where it bends about 20° 
to the north and extends to a point about three-fourths of a mile 
southeast of Colegrove and something over a mile northeast of the 
Salt Lake field. Here it appears to bend again to the north, probably 
trending about N. 60° W. In the Los Angeles city fields, that is, 
