Page 59 - 1915, Springs of CA.

HOT SPRINGS. 55

The canyon is large and rugged and is cut through massive granitic
material. At the springs a band of gneiss is exposed, whose planes
of schistosity dip nearly vertically to the west and strike about N.
10° W. at a considerable angle to the canyon, which here trends
about N. 75° E.

LOWER SPRINGS ON SOUTH FORK OF SAN JOAQUIN RIVER (FRESNO 4).
About 10 miles below the Blaney Meadow Springs, on the south
side of the stream, another group of hot springs and seepages forms a
considerable area of moist land on the slopes above the river. The
four larger springs are used as bathing pools by campers who visit the
place during the summer months.

REDS MEADOWS HOT SPRINGS (MADERA 6).
In the high Sierra east and southeast of Yosemite Valley are
numerous meadows that are favorite summer camping places for those
who etfjoy the mountains. Reds Meadows, in the northeastern end
of Madera County, is one of the chief of these, for it lies at the junction
of trails that lead east to Mono Valley, and north, south, and west to
other portions of the mountains. On the eastern side of this meadow
several small thermal springs issue. A bathing pool has been made at
the largest spring, in which a temperature of 120° was recorded. The
pool is excavated in a small deposit of lime carbonate that has formed
at the spring. The following analysis shows the character of the
water:

Analysis of water from main spring, Reds Meadows Hot Springs, Madera County, Cal.
[Analyst and authority, F. M. Eaton (1909). Constituents are in parts per million.]

49° C. (120° F.)
Properties of reaction:
12
0
0
53
35
42
By Reacting
Constituents.
weight. values.
Sodium (Na)........................................................................ 140 6.09
Potassium (^.)....... ..................................... .......................... 6.4 .16
Calcium (Ca). ....................................................................... 62 3.08
3.3 .27
Iron (Fe)......... ..................................................................
} " .16
Sulphate (SOt). ..................................................................... 36 .76
CW.oritLt>(Cl)... ..................................................................... 12 .35
Carbonate (C03).... ................................................................ 243 8.10
Silica (SiO2)....... ................................................................. 133 4.41
640.2
Carbon dioxide (CO2>... ............................................................ Present. Present.