CLARKE.] 
CARBONATE ROCKS. 
273 
The following samples from Aspen were analyzed by L. G. Eakins 
in the Denver laboratory. Partial analyses, C0 2 calculated as before. 
H. Blue limestone. 
I. Limestone. 
J. Dolomite. 
H. 
I. 
J. 
Insoluble 
.52 
.88 
31.16 
20.64 
47.19 
.33 
trace 
55.81 
.16 
44.03 
.84 
1.31 
30.46 
20.90 
46.92 
FeA 
CaO 
MgO 
co 2 
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. 
D. 
E. 
F. 
G. 
Insoluble 
FeA 
FeO 
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 
.03 
.35 
32.14 
18.72 
45.85 
CaO 
MgO 
C0 2 
96.75 
99.23 
96.08 
98.30 
98.66 
97.67 
99.05 
H. 
I. 
J. 
K. 
L. 
M. 
Insoluble 
FeA 
FeO 
CaO 
2.27 
>•» 
53.79 
.46 
42.76 
.22 
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 
.03 
.07 
55. 68 
trace 
43. 75 
MgO 
C0 2 
99.42 
99.18 
99.92 
99.72 
99.95 
99.64 
Bull. 168- 
-18 
