Page 303 - 1915, Springs of CA.

SULPHUR SPRINGS. 283

Cretaceous shales of Point Loma, but as it is exposed only at low
tide its existence is known to very few people.

SULPHUR SPRING SOUTHEAST OF CARBON (SHASTA 10).
There are a few isolated cold sulphur springs in the Cascade-
Sierran ranges of the State. Among them is a small cool sulphur
spring that issues about 1 mile southeast of Carbon post office in
Shasta County, a short distance east of Hat Creek. The water flows
only a few yards from its source and is seldom used for drinking, but
the spring is of interest because noticeably sulphureted waters are
uncommon in this part of the State, where the surface rocks consist
almost entirely of lavas.

SULPHUR SPRING NEAR HEAD OF BATTLE CREEK MEADOWS (TEHAMA 3).
Near the head of Battle Creek Meadows'and about 1J miles north-
east of Mineral post office, which is near the southern base of Lassen
Peak, is a small cool sulphur spring. It issues in a ravine, 15 yards
from the eastern bank of the creek and 150 yards east of the stage
road. In 1910 there was a house between the creek and the road,
and the spring had been cleaned out and was used for drinking. It
yields about 8 gallons a minute of cold, noticeably sulphureted water
which deposits small amounts of sulphur.
The rock that is exposed along the creek is the basaltic lava of
Lassen Peak. It is worthy of mention that this is the only cold
sulphur spring that was seen in the Lassen Peak region, the other
sulphur springs being of notably thermal character.

McLEAR SULPHUR SPRINGS (PLUMAS 15).
On the southeast side of Mohawk Valley, near the southern border
of Plumas County, is a group of sulphur springs that might as prop-
erly be described with the hot springs, for five of the eigfyt springs
that rise here are warm, but they are best known as sulphur springs,
though they are also indicated as thermal on Plate III (in pocket).
The principal springs are situated a short distance back of the
buildings on the McLear ranch, rising for a space of about 500 yards
along the eastern border of the valley from lake sediments that have
been described by Turner.1 The southernmost of these springs
issues from two vents about 4 yards apart in a bank of sandstone,
and yields about 8 gallons a minute of water 84° in temperature,
A second warm spring that rises 100 yards northward in a cut in the
bank yields about the same amount of water whose observed temper-
ature was 85°. About 85 yards farther to the northeast a spring
that yields approximately 30 gallons a minute, of water with a tem-
i Turner, H. W., Philos. Soc. Washington Bull., vol. 11, pp. 385-410,1891.