Page 230 - 1915, Springs of CA.

212 SPRINGS OP CALIFORNIA. '

Chemical reactions that take place after the solution of the min-
erals may account in part for the abnormal temperatures of the
springs; the intense movement that has tilted the beds at steep
angles may also have produced a high thermal gradient, and thus
partly account for them.
GRANT SPRING (SANTA CLARA 2).
About 5 miles above Alum Rock Park there is a small carbonated
spring which is known as Grant Spring. Its water has been bottled
and placed on the local market for table use.
The rocks at this locality appear to be the same as those lower down
the canyon, and the spring seems otherwise to be similar in occur-
rence to the springs in Alum Rock Park.

CONGRESS SPRINGS (SANTA CLARA 5).
Congress Springs, which were formerly known as Pacific Congress
Springs, are in a canyon near the edge of Santa Clara Valley, 12
miles southwest of San Jose. They were improved for many years as
a resort, and the water formerly was in considerable demand for table
use, but in 1903 or 1904 the hotel burned, and since that time the
property has not been so well kept up.
Two small carbonated springs rise at the upper end of the grounds,
on the north bank of Campbell Creek. A spring house has been
erected over one of them, and a portion of its flow rises in a cemented
brick drinking basin. The other spring is 30 yards farther upstream.
A small house that inclosed a gas-collecting tank stood over it in
1908. Its gas (carbon dioxide) and water were formerly piped to
bottling works a short distance below the lower spring. The analysis
(p. 213) probably represents water from the upper spring and indicates
that it is a primary alkaline and saline water containing a large pro-
portion of iron and aluminum.
A considerable deposit of lime carbonate appears in the bed of
Campbell Creek 200 or 300 yards below the springs. The position
and character of this deposit suggests that it was formed at a time
when carbonated water emerged at or near that place.
The springs issue in an area of dark-gray sandstone that belongs
to the Franciscan formation. This material is cut by dikes of dark-
gray diabase, and it is thought that a small dike of this rock crosses
Campbell Creek a few yards above the upper spring. If this is true, the
dike rock may have some influence on the rise of carbonated water
at this place.
AZULE MINERAL SPRING (SANTA CLARA 4).
Azule Mineral Spring is situated in a ravine a mile northward
across a divide from Congress Springs. It was first known as Mills
Seltzer Spring, but the name was early changed to Azule, from the