CLARKE.] 
CARBONATE ROCKS. 
323 
F. Calcareous tufa, Mammoth Hot Springs. 
G. Travertine, from cavity near Pulsating- Geyser, Mammoth Hot 
Springs. 
H. Travertine, from bank of Hot River. 
I. Travertine, from edge of old cave, highest terrace, Mammoth 
Hot Springs. 
J. Travertine, capping Terrace Mountain, Mammoth Hot Springs. 
K. Calcareous sinter, Hot Lakes. Specific gravity, 2.857. 
F. 
G. 
11. 
I. 
J. 
K. 
Si0 2 
.05 
.06 
55. 34 
.26 
.05 
.11 
52. 46 
.90 
.67 
.19 
53. 89 
.78 
.03 
. 04 
55. 64 
.19 
.09 
.11 
55. 37 
.35 
1.52 
A1A, Fe 2 3 
CaO 
traces 
54. 26 
MgO 
trace 
MnO 
.29 
K 2 . . 
.71 
.33 
1.45 
40. 88 
trace 
.04 
Na 2 
NaCl 
.03 
42. 78 
trace 
.32 
1.37 
.04 
.02 
.06 
41. 95 
.09 
43.35 
.10 
43. 11 
CO, 
40.76 
P„0< 
S0 3 
1.82 
« 1.02 
.30 
1.25 
a 1.27 
.26 
.24 
a .'45 
.14 
.44 
«.32 
.17 
trace 
H 2 
2.89 
C, organic 
H, organic. . 
100. 27 
100. 03 
100. 32 
100.17 
100. 10 
99. 72 
a Includes H of organic matter. 
