183 
LOS ANGELES DISTRICT: WESTERN FIELD. 
The three following well logs indicate the character of the strata 
in the Oolegrove area. They are given in order down the dip of the 
strata from the northeast edge of the area toward the Salt Lake field. 
Log of well on northeast edge of the group drilled in the SE. { sec. 15. T. 1 S., R. 14 l V ., 
Los Angeles. 
[Elevation, 239 feet above sea level.] 
Soil.. 
Hardpan.. 
Blue clay. 
G ray clay... 
Fine black sand and clay; water at 47 feet, but soon exhausted 
Fine black sand and shale. 
Oil sand; showing of oil from 60 to 119 feet. 
Sandy shale. 
Alternating brown shale and oil sand. 
Shale.;. 
Tar sand in 3-foot layers. 
Tar sand separated by thin layer of shale. 
Tar sand; dry toward top; tar bed at base... 
Quicksand with water. 
Thick¬ 
ness. 
Depth. 
Feet. 
Feet. 
' 6 
6 
8 
14 
21 
35 
15 
50 
22 
72 
40 
112 
7 
119 
6 
125 
29 
154 
6 
160 
36 
196 
84 
280 
37 
317 
5 
322 
Log of well on southwest edge of the group'drilled in the SE. { sec. 15, T. 1 S., R. 14 IF., 
, Los Angeles. 
[Elevation, 245 feet above sea level.] 
Thick¬ 
ness. 
Depth. 
Red sand. 
Feet. 
50 
Feet. 
50 
Yellow clay. 
83 
133 
Hard •‘shell”. 
4 
137 
Sandstone and shale. 
10 
147 
Shale; 1-foot “shell” at 186 feet... 
108 
255 
Ta r sand. 
1 
256 
Shale; 1-foot “shell ” at 284 feet; 3-foot “shell” at 302 feet. 
7 
363 
Conglomerate. 
i 
364 
Shaic.. 
7 
371 
Oil sand; 1-foot “shell” at 380 feet; 4-foot “shell” at 448 feet; 1-foot “shell” at 484 
feet... 
156 
527 
Conglomerate. 
10 
537 
Oil sand. 
9 
546 
Conglomerate. 
2 
548 
Oil sand... 
48 
596 
Conglomerate. 
5 
('01 
