322 ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY. [no. 228. 
YELLOWSTONE NATIONAL PARK. 
Travertines, tufas, and calcareous sinters. Analyses A to E reported 
by W. II. Weed in 9th Ann., p. Gil). Travertines. 
A. Terrace below the hotel. 
B. Cupids Cave. 
C. Near Sulphur Spring No. 246, Mammoth Hot Springs. 
D. Extinct spring, main terrace, Mammoth Hot Springs. 
E. Ridge behind main terrace. 
Analysis C by F. A. Gooch, record No. 243; A, B, D, and E by 
J. E. Whitfield, record Nos. 240, 242, 244, 245. 
A. 
B. 
C. 
]>. 
E. 
Si0 2 
ALO, 
.08 
.15 
.15 
.40 
.01 
} . 05 
55. 02 
.07 
.04 
.06 
.14 
.26 
.11 
Fe.,0, 
CaO 
53. 83 
.90 
5:;. 41 
.42 
.01 
. 03 
55. 02 
. 06 
54. 06 
MgO 
.66 
K 2 
Na 2 < ) 
II,o 
1.43 
• 02 
2.44 
.13 
1.61 
.12 
1 . 06 
.20 
.08 
.70 
•12.25 
.24 
1. 19 
NaCI 
.26 
KC1 
so, 
1.72 
41. 79 
.21 
.55 
41.96 
.37 
.49 
42. 25 
.11 
1.34 
CO, 
42. 14 
C (organic) 
none 
100. 13 
99. 66 
99. 77 
99.81 
100.02 
The following analyses are hitherto unpublished: Analyses F, I, J, 
by F. A. Gooch, record Nos. 93, 240, 257; G, H, K, by J. E. Whitfield, 
record Nos. 239, 241, 862. 
