CLARKE.] 
CARBONATE ROCKS, 
825 
IDAHO. 
A. Marble, Orofino. 
B. Limestone, Missouri Creek, Nez Perces County. 
Analyses A and B by W. F. Hillebrand, record No. 1905. 
C. Limestone, Snake River Canyon. Analysis by George Steiger, 
record No. 1909. 
A. 
B. 
C 
Insoluble 
.64 
.12 
3. 05 
51. 96 
44. 08 
trace 
1.19 
.19 
.51 
54. 75 
43. 50 
trace 
.36 
A1 2 3 , Fe 2 3 
.10 
MgO 
.10 
CaO 
55. 34 
C0 2 , calculated . 
43.59 
Organic matter 
99. 85 
100.14 
99. 49 
COLORADO. 
1. DENVER BASIN. 
Rocks described by Emmons in Mon. XXVII. 
L. G. Eakins, in the Denver laboratory. 
A. Upper Wyoming- limestone, Morrison. 
B. Niobrara dolomite. 
Analyses made by 
Insoluble 
A1A--- 
Fe 2 3 --- 
MnO .... 
CaO .... 
MgO.... 
H 2 0.... 
PA-.. 
co 2 
A. 
5.32 
12.01 
.53 
.54 
.38 
• .11 
.49 
.20 
48.73 
27.49 
2.95 
18.03 
.11 
.61 
.03 
.03 
41.71 
41.40 
100.25 100.42 
