Page 200 - 1915, Springs of CA.

184 SPRINGS OF CALIFORNIA.

gallons and one-fourth gallon a minute. From about 30 to nearly 55
yards beyond the Magnesia Spring much water rises beneath a platform.
This water supplies an adjacent bathhouse and is also piped across
the creek to a swimming plunge. Temperatures of 72° to 82° were
recorded at different points beneath the platform. The discharge, as
nearly as it could be estimated, is about 10 gallons a minute. There
are two small pools with slight overflow along the creek bank a few
yards north of the bathhouse and an iron-stained seepage area extends
about 10 yards along the creek edge. Beyond this area there is a small
board-curbed pool which discharges about 2 gallons a minute of
water 73° in temperature. Ten yards beyond, at the northern end
of the line of springs, Arsenic and Dutch springs rise in separate
compartments of a circular, cemented basin near the creek edge.
Their recorded temperatures were, respectively, 68° and 72°. Ar-
senic Spring yields approximately one-half gallon ' a minute and
Dutch Spring perhaps twice as much.
All the springs are carbonated, and their basins are stained by
iron. Small amounts of lime carbonate are deposited at several
places, and south of the springs, along the road westward from the
hotel, a deposit of lime carbonate several feet thick is exposed for
50 yards or more. The springs seem to issue mainly from crushed
sandstone and shale, but along the northern part of the bank from
which they come forth slickensided, apparently serpentinized mate-
rial is exposed. The temperature of the water suggests that crushing
and other movements have here taken place and have given rise
to the springs. The locality is shown on the map (PL III, in pocket)
as one of thermal carbonated springs, but the springs are known chiefly
for their carbonated waters, which the following analyses show to be
essentially secondary alkaline in character.