POTASH SALTS AND OTHER SALINES IN THE GREAT BASIN REGION. 19 
Analyses of hot spring waters — Continued. 
Constituent. 
G. 
H. 
1.1 
J.i 
K.i 
L.i 
M.i 
CI 
Per cent. 
. 20.25 
32.97 
Per cent. 
10.98 
15. 13 
Per cent. 
2.63 
4.04 
Per cent. 
9.74 
6.96 
Per cent. 
Trace. 
8.21 
Per cent. 
47.93 
11.25 
Per cent. 
47.53 
so* 
8.15 
s 
co 3 
Trace. 
27.97 
23.84 
18.08 
25.6 
.67 
1.36 
B967 
Na 
30.03 
1.61 
Trace. 
3.10 
.29 
29.56 
3.05 
12.83 
2.12 
10.67 
5.33 
2.25 
5.15 
32.63 
2.70 
31.92 
K 
2.80 
Li 
Ca 
2.84 
2.92 
5.96 
2.02 
5.34 
2.55 
11.11 
Trace. 
2.48 
Trace. 
2.10 
Mg 
Trac9. 
As 
AI2O3 
.09 
'7.46 
Si0 2 
2 11.75 
100.00 
118.3 
100.00 
206.9 
Total solids on evaporation 
99.2 
43.2 
■ 
62.0 
44.40 
428. 
1 Analyses not complete. Percentages based on solids on evaporation. 
s Calculated as Si0 3 . 
A. Water from hot salt spring near bathhouse, Silver Peak, Nev. R. Dole, Bui. No. 530, XJ. S. Geol. Sti r- 
vey, p. 16. 
B. Water from hot salt spring at northeast end of marsh, Silver Peak, Nev. E. Dole, Bui. No. 530, U. S. 
Geol. Survey, p. 16. 
C. Utah Hot Springs, 8 miles north of Ogden, Utah. Analysis by F. W. Clarke. Clarke, Bui. No. 491, 
U. S. Geol. Survev,p. 172. 
D. Steamboat Springs, Nev. Analysis by W. H. Melville Clarke. Bui. No. 491, U. S. Geol. Survey, 
p. 175" 
E. Hot Springs, Hot Spring Station, Central Pacific Railway. Analysis by T, M. Chatard, Ru ssell, 
Monograph U. S. Geol. Survey, No. 11, p.. 49. 
F. Schaffer's Spring, Honey Lake, Nev. Analysis by T. M. Chart ard, Russell, Monograph No. 11, U. S. 
Geol. Survey, p. 51. 
G. Hot spring, near Granite Mountain, Nev. Analysis by T. M. Chatard, Russell, Monograph No. 11, 
IT. S. Geol. Survey, p. 53. 
H. Warm spring, Mono Lake. Analysis by T. M. Chatard, Russell, 8th Annual Report, U. S. G eo I. 
Survey, p. 288. 
I. Paradise Valley Spring, Nev. Analysis by J. A. Cullen. This spring contains hydrogen sulphide. 
J. X L spring, Oregon Lake Region. Analysis by J. A. Cullen. 
K. Hot springs, in Thousand Springs Valley, 30 miles northeast of Wells, Nev. Analysis by J. A. Cullen. 
L. Boiling spring, 0.75 mile northwest of Gerlach, Nev. Sample by W. S. Palmer. Analysis by J. A. 
Cullen. 
M. Mean analyses of 4 spring waters taken one-fourth mile northeast of Geilach, Nev. Temperature of 
waters from 61° to 90° F. Samples by W. S. Palmer. Analyses by S. C. Dinsmore. 
In three of these spring waters the total solids exceed 1,000 parts per 100,000 of 
water, or over 1 per cent. The highest of these contains some 3 per cent total solids. 
The remainder contain from 0.1 to 0.8 per cent total solids. In seven of these waters 
chlorides predominate, while in the others chlorides and sulphates are about equally 
divided. In three of the waters only are carbonates conspicuous. Bicarbonates are 
present in seven cases. The average ratio of sodium to potassium is 10.9. In three 
cases the sodium-potassium ratio is notably low. The lime, magnesia, and silica are 
generally low. In the case of the Utah Hot Springs and the warm springs of the Silver 
Peak district the lime content is high, while in the case of the Steamboat Springs and 
hot springs of the Central Pacific Railroad the silica is high. In only one case has 
boric anhydride been noted. 
Hot springs contribute to the salines of the basin, but it is believed that their total 
contribution must be small, as the flow from such springs is in the aggregate not very 
large, while the saline content is usually quite small. Perhaps all the hot springs of 
the basin would not contribute an amount of saline material equal to that from 
a fair-sized stream. How important the contributions to saline material in past 
geological ages from this source were we can not conjecture. 
QUATERNARY AND RECENT VOLCANIC ACTIVITY. 
Extinct craters are not uncommon in the basin region. The centers in which these 
cones are to be found are Lassen County, in the vicinity of Mono Lake, and in the 
vicinity of Great Salt Lake. In these three localities many cones have been described. 
In the Carson Sink, Big and Little Alkali Lakes have been determined to be the 
craters of extinct volcanoes. Northeast of Blair, in the Silver Peak district, Nev., 
is a large cone. East of milepost 48 on the road between Goldfield and Rhyo- 
lite are two cones, while southeast of Rhyolite in Crater Flat is another. In Death 
Valley are evidences which point to the possible existence of recent vents. In 
Owens River Valley is also a cone. In addition to the volcanic cones many recent 
