LOS ANGELES DISTRICT: CENTRAL FIELD. 
165 
as high as 50 or 60 barrels at their inception, but these were unusual. 
In addition to oil the wells produce more or less gas. The oil is black 
and varies in gravity from 16° to 19° B., the lighter oil coming, it is 
said, from the higher sand. 
CENTRAL FIELD. 
LOCATION. 
The central field occupies the territory lying between the Sisters’ 
Hospital, corner of Sunset boulevard and Beaudry avenue, on the 
east, and Coronado street, one-fourth mile north of Westlake Park, 
on the west. Its northern boundary is an almost straight east-west 
line drawn from the middle of the west side of the hospital grounds 
to a point on Coronado street about 100 yards north of Ocean View 
avenue; its southern boundary is Ocean View avenue from Coronado 
street east to Arnold street, thence a line east to the corner of First 
and Lucas streets, thence a line to the corner of Temple street and 
Beaudry avenue, and finally Beaudry avenue from Temple street to 
Sunset boulevard. The productive territory is about 1^ miles long, 
1,000 feet wide near its east end, and 300 feet near its west end. The 
total area is approximately nine-twentieths of a square mile. Like 
the eastern field, the central is a narrow band through one of the 
thickly populated residence districts of the city, the wells in many 
cases being put down in close proximity to houses and store buildings. 
TOPOGRAPHY. 
Northwest of the business portion of Los Angeles and east and 
northeast of Westlake Park is a tableland or terrace lying at an ele¬ 
vation of about 100 to 150 feet higher than the main portion of the 
city. This table-land is bounded on the north and west by a ravine 
extending southwestward from a point immediately west of the north 
end of Echo Lake and is bisected by a narrow valley which contains 
Echo Lake and extends south-southwestward toward the business 
center. In addition to these, several small ravines drain toward the 
southwest from the top of the terrace. The central field occupies the 
top of the terrace immediately south of the ravine first mentioned, 
extends eastward across the table-land to the Echo Lake valley, down 
into and across this depression and up again on to the terrace, and 
thence across it to the eastern limit of the field at the Sisters’ Hospital. 
GEOLOGY. 
The formations involved in the geology of the region immediately 
adjacent to the central field comprise the upper portion of the Puente 
formation, with its two bands of white siliceous shale and the inter¬ 
vening sandstone layer, and the soft sandstone and sandy shale of 
i t 
Bull. 309—07-12 
