Page 311 - 1915, Springs of CA.

SALINE SPRINGS. 291

The following analysis of the marketed salt indicates that the water
from which it is derived has a somewhat different composition from
that of the other springs, and the absence of calcium and magnesium
from it seems questionable. The average proportion of the soluble
materials in ocean water is tabulated with it, for comparison.
Analyses of Tuscan Springs salts and soluble matter in ocean water.

Tuscan Ocean
Springs water.6
salts."
Sodium (K&\.... ................................................................... 28.05 30.65
Potossiam(K).. .................................................................... 15.50 1.11
Lithium (Li)............. ........................................................... .02
Calcium (Caj........................................................................ 1.20
3.75
Sulphate (SO4)...................................................................... .62 - 7.68
Chloride (01)........................................................................ 55.77 55.20
.20
Carbonate (CO3).... .............................................................. .14 .21
100.10 100.00
o Analyst. N. Lehnen (1905). Authority, advertising matter.
6 Recalculated from average composition of ocean water: Dittmar, Challenger Reports, Physics and
chemistry, vol. 1, p. 204,1884.
The springs rise in dark-colored shale and sandstone, the latter
material being veined in places with calcite. The structure shows
that the beds have been folded into a small arch or anticline at this
locality. Dips of 50° on the western side of the fold were observed.
The occurrence of usable quantities of illuminating gas is worthy of
mention in connection with this anticlinal structure, as is also the
presence of a large mound, shown in Plate XII, B (p. 200). This
mound has the appearance of a spring formation, although the
material on its surface was not noticeably different from that of the
adjacent slopes. The sediments are overlain by volcanic agglom-
merate or tuff, which forms the cliffs of the canyon walls. The
marine sediments have been described by Diller 1 as part of the
Chico formation, of Upper Cretaceous age, and the fresh-water
deposit of tuffaceous material that overlies them has been named the
Tuscan tuff and is of Pliocene age.2

RICHARDSON SPRINGS (BUTTE 2).
Richardson Springs are situated in the canyon of Mud Creek, 12
miles north of Chico. The property has been developed as a medicinal
and vacation resort since 1898. In 1909 the improvements included
a main hotel, three large rooming cottages, a number of small ones,
and a bathhouse. The buildings are on the slope on the northern side
1 Dfller, J. S., Geology of the Lassen Peak district: U. S. Geol. Survey Eighth Ann. Rept., pt. 1, p. 411,
1889; Tertiary revolution in the topography of the Pacific coast: U. S. Geol. Survey Fourteenth Ann.
Rept., pt. 2, pp. 405-406,1894.
2 Diller, J. S., Geology of the Lassen Peak district: U. S. Geol. Survey Eighth Ann. Rept., pt. 1, pp.
422-424, 1889.