328 
ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY. 
[NO. 228. 
The following samples from Aspen were analyzed by L. G. Eakins 
in the Denver laboratory. Partial analyses, C0 2 calculated as before. 
H. Bine limestone. 
I. Limestone. 
J. Dolomite. 
H. 
I. 
J. 
.52 
.88 
31. 16 
20.64 
47.19 
.33 
trace 
55.81 
.16 
44.03 
.84 
FeO, 
1.31 
CaO 
30.46 
MgO 
20.90 
co 2 
46.92 
100. 39 
100. 33 
100. 43 
5. GLENWOOD SPRINGS, GARFIELD COUNTY. 
Limestones and dolomites collected under the direction of S, F. 
Emmons. Analyses, partial only, by George Steiger, record No. 
1559. C0 2 calculated to satisfy bases. 
A. 
B. 
c. 
I). 
E. 
F. 
G. 
Insoluble 
21.45 
.97 
.23 
40.64 
.73 
32. 73 
47.74 
.18 
.71 
15.87 
10.60 
24. 13 
6.47 
.42 
.35 
46.65 
2.64 
39. 55 
3.71 
none 
.55 
47.40 
4.49 
42. 15 
9.44 
.26 
.32 
39.56 
8.56 
40.52 
17.82 
.74 
.57 
26.50 
14.86 
37.18 
1.96 
Fe 2 3 
.03 
FeO 
.35 
CaO 
32.14 
MgO 
18.72 
co 2 
45.85 
96.75 
99.23 
96.08 
98.30 
98.66 
97.67 
99.05 
H. 
I. 
J. 
K. 
L. 
M. 
Insoluble 
} 
2.27 
.14 
53. 79 
.46 
42.76 
} 
.29 
trace 
55.17 
.21 
43. 58 
} 
.23 
.09 
55.49 
.24 
43.87 
.06 
none 
none 
55. 81 
trace 
43.85 
.22 
.10 
.10 
55. 45 
.24 
43.84 
.11 
Fe 2 3 
.03 
FeO 
.07 
CaO 
55.68 
MgO _- 
trace 
CO, 
43.75 
99.42 
99.18 
99.92 
99.72 
99.95 
99.64 
