Page 179 - 1915, Springs of CA.

CABBONATED SPEINGS. 163

still issues. One of these is at Tolenas Springs, in Solano County,
about 6 miles north of Fairfield. The material outcrops over an area
about 100 yards in diameter, on slopes near the top of a range of
hills composed of soft shale and sandstone, and carbonated saline
water seeps from two shallow pools at the deposit. The principal
spring, however, is on the hillside 300 yards westward and 50 feet
higher, where a pit has been excavated a few feet deep in a small
deposit of the onyx marble. In 1909 separate pipes conducted the
water and the carbon dioxide to a bottling house a short distance
away. Only sedimentary rocks were observed near these springs,
but "a breccia of shale, sandstone and volcanic ash, cemented
by lime and traversed by veins and bunches of aragonite (?)" has
been mentioned by Day.1 Considerable stone has been shipped
from the deposit, but the material is too cavernous to be suitable
for extensive use as a decorative stone, and quarrying was discontinued
a number of years ago. Most of the stone is light colored and trans-
lucent, with white, cloudy mottling, but some darker material was
noticed. Banded aragonite, several inches thick, has been deposited
in some places on more compact calcite. The analysis of the material
tabulated on page 165 with that of similar material from San Luis
Obispo County represents a specimen of the calcite.
Another carbonated saline spring emerges in a ravine 300 yards
southeast of the quarry and has been used as a watering place by
range cattle and horses. It has built up a deposit of lime carbonate
several yards in diameter.
Analyses of water from Tolenas Springs, Solano County, Cal.
[Constituents are in parts per-million.]
1 2
17° C. (62° F.)
Properties of reaction:
59 61
0 0
0 0
19 19
22 20
13 13
By Reacting By Reacting
Constituents.
weight. values. weignt. values.
1,760 76.55 1,930 83.92
Potassium (K). ................................................ 65 1.67 59 1.51
Calcium (Ca). .................................................. 342 17.03 331 16.52
57 4.70 54 4.42
Iron (Fe).. ..................................................... 7.3 .26 5.3 .19
10 1.11 8.7 .96
Chloride (Cl). .................................................. 2,068 58.34 2,288 64.51
Iodide (I)...................................................... 23 .18 27 .21
Carbonate (COg).................................... ........... 1,154 38.45 1.151 38.36
Metaborate(BO2).............................................. 139 3.24 150 3.48
Silica (SiO»)... ................................................. . 33 1.09 27 .91
5,658.3 6,031.0
Carbon dioxide (CO2).......................... ................ 266 12.09 287 13.05
1. Main Spring. Analyst and authority, Winslow Anderson (1888).
2. Main Spring. Analyst, J. Hewston, jr. (prior to 1888). Authority, U. S. Geol. Survey Bull. 32.
i Day, W. C., Stone: U. S. Geol. Survey Twentieth Ann. Rept., pt. 6 (continued), p. 288,1899.