Page 132 - 1915, Springs of CA.

124 SPRINGS OP CALIFORNIA.
warmer than that of the springs a few miles northward. There are
also several small warm springs near the road between these two
groups of springs.

WARM SPRINGS AT SOUTH END OF SURPRISE VALLEY (MODOC 18).
A small amount of warm water rises in meadowland at the south
end of Surprise Valley. This water may rise along a fault zone, as
the principal springs of the valley are considered to rise, but it may
also be of alluvial artesian character.
BOYD SPRING (MODOC 12).
Boyd Spring is marked on some maps as Boyd Hot Spring, but its
recorded temperature in 1909 was only 67°. The water has no
noticeable taste, and in several respects it seems to be a spring of
alluvial artesian origin rather than one whose existence is due to the
rock structure. It is mentioned with the hot springs of Surprise
Valley, however, because it is to some extent thermal and may have
a structural origin. It is situated near the eastern side of Upper Lake,
on a gentle greasewood-covered slope. A tule-grown pool has formed
here, about 15 by 25 yards in dimensions, in which there are many
small fish. The discharge flows westward in a sluggish stream of
perhaps 1,000 gallons a minute, though at the point where the stream
was measured the current was so slight that its volume could be only
roughly approximated. In 1909 it was used for irrigating meadow
half a mile or more to the northwest.

SHAFFER HQT SPRINGS (LASSEN 16).
In Honey Lake valley there are two large groups of hot springs
one, the more interesting, near Hot Springs railroad station and the
other near Amedee. At the former locality, near the northeastern
side of Honey Lake, a belt of calcareous tufa extends from the base
of steep slopes that border the valley near the railroad station south-
westward for nearly half a mile. The continuity of the surface exposure
of the material is then broken, but the course of the deposit is marked
for two-thirds of a mile farther by prominent crags and knolls of the
material that rise in meadow and salt-grass land that extends to the
lake. One of these crags is shown in Plate VIII, A. Seepage springs
rise at several points along the middle part of this tufa belt, but the
springs of chief interest issue beyond its most lakeward outcrop.
They are not known locally by a definite name, but as they were
referred to in 1882 by Russell as Shaffer Hot Springs, this name is
here used.
The principal spring rises with vigorous ebullition in a pool about
10 yards in diameter and 1 or 2 feet deep. The water was formerly