262 ANALYSES OF KOCKS, U. S. GEOLOGICAL SURVEY. 
INDIANA, 
A. Bull limestone, Hoosier Stone Company, Bedford. 
B. Blue limestone, same locality. 
Analyses by F. W. Clarke, record Nos. 306, 307. 
[bull. 168. 
Si0 2 . 
Fe 2 3 
CaO. 
MgO 
PA- 
co,. 
so 3 . 
.63 
1.69 
.39 
.49 
54. 19 
54.18 
.39 
.37 
trace 
trace 
44.01 
43. 08 
none 
none . 
99.61 
B. 
99.81 
The following Trenton limestones are all from the natural-gas belt : 
C. Union City. Depth, 1,160 feet. 
D. Bluffton. . Depth, 1,062 to 1,067 feet. 
E. Muncie. Depth, 920 feet. 
F. Greensburg. Depth, 867 feet. 
G. Vernon. Depth, 905 feet. 
H. Wabash. Depth, about 900 feet. 
Analysis C by F. W. Clarke, record No. 738. The remainder by 
Charles Catlett, Nos. 753, 758. 
c. 
D. 
E. 
F. 
G. 
H. 
Insoluble 
2.14 
2.37 
3.30 
.87 
8.00 
3.52 
Al 2 3 .Fe 2 3 --- 
1.23 
4.48 
3.72 
.55 
.60 
7.58 
CaC0 3 
83.21 
53. 43 
51. 96 
94.60 
85.56 
53.18 
MgC0 3 
12.48 
37.47 
38.11 
.36 
trace 
30.53 
99.06 
97.75 
. 97.09 
96.38 
94.16 
94.81 
