CLARKE.] 
CARBONATE ROCKS. 
271 
2. LEADVILLE DISTRICT. 
Rocks described by Emmons in Mon. XII. Analyses A and E by 
TV. F. Hillebrand; B, C, and D by A. Guyard; all made in the Denver 
laboratory. 
A. Upper blue limestone, Silver Wave mine. 
B. Upper blue limestone, Dugan quarry. 
C. Upper blue limestone, Glass-Pendery mine. 
D. Montgomery quarry, near base of blue limestone. 
E. White limestone, upper part, Carbonate Hill quarry. 
A. 
B. 
C. 
D. 
E. 
11.84 
1.66 
1.51 
.83 
Si0 2 
.21 
.27 
.21 
.24 
trace 
30.79 
21.14 
.03 
.06 
.22 
trace 
46.84 
trace 
.10 
trace 
.03 
.70 
.17 
.11 
.38 
.05 
30.43 
20.78 
.05 
.09 
.04 
.12 
46.93 
.27 
.04 
.22 
.13 
.20 
29.97 
21 . 52 
.01 
.02 
.07 
.03 
47.39 
7.76 
.11 
.10 
.57 
.06 
27.26 
20. 05 
.02 
.04 
.05 
.07 
43.79 
trace 
.06 
trace 
.07 
A1 2 3 
Fe 2 3 
FeO 
MnO 
CaO 
MgO 
26.60 
17.41 
.02 
.03 
.48 
trace 
40.01 
K 2 
Na 2 
H 2 
P 2 5 
CO, 
so 3 
CI 
.14 
trace 
.03 
.04 
.05 
FeR 2 
Organic matter 
.02 
100. 14 
100.02 
99.93 
100. 01 
100.44 
