324 
ANALYSES OF KOCKS, U. S. GEOLOGICAL SURVEY. 
[NO. 228. 
MONTANA. 
Rocks collected by A. 0. Peale. Analyses by Charles Oatlett, record 
Nos. 890, 005. 
A. North of East Gallatin River. 
B. West of North Boulder River. 
C. D. North of East Gallatin River. 
E. Base of Carboniferous, west side of Bridget- -Range. 
F. Middle Carboniferous, north of Gallatin River. 
G. H. Upper Carboniferous, north of Gallatin River. 
Analyses all partial. A, B, C, D, and H were published by Peale 
in Bull. 110, pp. 16, 28, and 40. 
A. 
B. 
c. 
D. 
.34 
.22 
54. 54 
43. 63 
1.78 
.40 
54. 54 
42.62 
23.50 
2.50 
67. 85 
6.18 
35.26 
Fe„().„ ALO, 
1.92 
CaCO-j 
59.11 
Mg( !0 3 
1.96 
99. 73 
99.34 
100.03 
98.25 
E. 
F. 
G. 
H. 
Insoluble 
Fe 9 0„ ALOo 
9.98 
.38 
88.50 
.95 
5. 99 
.58 
91. 96 
1.35 
50. 74 
.30 
32. 28 
13.91 
25.24 
5.30 
CaC0 3 
MgC0 3 . . 
40.21 
25. 25 
99.81 
99.88 
97. 23 
96.00 
