Page 300 - 1915, Springs of CA.

280 SPRINGS OF CALIFORNIA.

the springs there is a small anticline or upward fold 1 in the Tertiary
sediments that predominate in this part of the State. At the larger
spring shaly sandstone is exposed in the tunnel, the walls of which
are impregnated with alum salts. Small amounts of lime carbonate
appear in the cut in front of the tunnel and more noticeable deposits
of the same material on the hillside below it.

SULPHUR SPRING IN SANTA SUSANA MOUNTAINS (LOS ANGELES 3).
A spring that is strongly charged with hydrogen sulphide issues
on the southern side of Santa Susana Mountains, on the Sparks
ranch, about 5 miles north of Chatsworth. In the early days it was
visited by the padres of Mission San Fernando, a few miles away,
and by the Indians of the locality. The following partial analysis
of its water made a number of years ago shows it to be secondary
alkaline and primary saline in character:

Partial analysis of water from sulphur spring in Santa Susana Mountains, Los Angeles
County, Cal.
[Analyst, Oscar Loew (1876). Authority, Wheeler report. Constituents are in parts per million.]
Properties of reaction:
23
o 0
8
69
( ?)
By Reacting
Constituents. weight. values.
Sodium (Na)........................................................................ 104 4.53
Potassium (K)............ ...................................................... ^... Trace. Trace.
Trace.
Calcium (Ca). .......................................................................
[ 203 10.10
Trace. Trace.
Trace. , Trace.
Sulphate (SO4). ............................................ .................. ....... 161 3.36
Chloride (Cl)........ ................................................................ Trace. Trace.
Carbonate (CO3) .................................................................... 338 11.27
Phosphate. ( P O 4) .................................................................... Trace. Trace.
Silica (SiO2)... ...................................................................... Trace. Trace.
806
50 2.93

The spring is still locally known, but its water has not been used
as much during recent years for medicinal purposes as it was formerly.
It has strongly impregnated the adj acent soil with sulphur. Another
seepage of strongly sulphureted water also issues near by.

1 Eldridge, G. EL, and Arnold, Ralph, The Santa Clara Valley, Puente Hills, and Los Angeles oil dis-
tricts, southern California: U. S. Geol. Survey Bull. 309, PI. 1,1907.