ci.akki:.] 
CARBONATE ROCKS. 
327 
3. FAIRPLAY, PARK COUNTY. 
Analyses made by W. F. Hillebrand, in tin 4 Denver laboratory. 
A. Serpentinous limestone. Buckskin Gulch. 
B. Limestone, Fairplay. 
C. Limestone, Mount Silverheels. 
I). Dolomite-limestone, Mount Silverheels. 
Analyses B, C, and D partial, with C0 2 calculated to satisfy bases. 
A. 
B. 
c. 
D. 
Insoluble 
2. 37 
.51 
1.98 
Si0 2 
17.64 
.99 
.62 
.18 
trace 
32. 23 
L9.01 
.07 
3. 72 
.05 
25.33 
.08 
A1 2 3 
Fe 2 3 
FeO 
) 
.19 
53. 64 
.73 
} ..10 
55. 50 
.17 
} 
MnO - 
. 46 
CaO 
30. 19 
MgO 
20. 47 
Alkalies 
II,() 
.51 
P 2 5 
C0 2 . . 
42.93 
43. 82 
46. 52 
CI 
99.92 
: 
00.37 
100. 10 
99.62 
4. PITKIN COUNTY. 
Limestones and dolomites collected under the direction of S. F. 
Emmons. Analyses by George Steig-er, record No. 1559. C0 2 calcu- 
lated to satisfy bases. Analyses partial only. 
Insoluble 
Fe 2 3 ... 
FeO 
CaO 
MgO . . . . 
co 2 
.16 
.22 
.09 
30.66 
20.94 
47.13 
.80 
1.63 
.23 
31. 19 
19.69 
46. 16 
1.02 
2.10 
.06 
33. 74 
16. 76 
44.94 
99.20 99.70 98.62 
13. 63 
1.88 
.64 
35. 98 
8.25 
37.35 
1.42 
3. 34 
.42 
31.61 
18.06 
44. 70 
■;; 
99.55 
31. 12 
.36 
. 19 
37. 28 
.54 
29. 88 
99. 37 
7.78 
.88 
.22 
38.85 
9.97 
41.47 
99. 17 
