CLARKE.] 
CARBONATE ROCKS. 
2. MISCELLANEOUS ROCKS. 
309 
A to M, inclusive. Thirteen borings from the artesian well at Key 
West. Partial analyses by Steiger, record No. 1553. The figures at 
tops of columns give depths in feet from which samples were taken. 
Si0 2 . 
AlA 
Fe 2 3 
CaO. 
MgO 
C0 2 . 
A. 
B. 
C 
D. 
E. 
25 
100 
150 
350 
600 
.17 
.25 
.12 
3.52 
5. 10 
.20 
.07 
.17 
.07 
1 .08 
1 .40 
| .35 
54. 03 
54.01 
54.38 
51.46 
48.87 
.29 
.77 
.86 
1.67 
2.50 
42. 52 
42.84 
43. 36 
41.77 
40. 72 
97.28 
98.11 
98.80 
98.82 
97.54 
775 
.13 
.14 
46.53 
6.70 
43.60 
M0 
G. 
H. 
I. 
J. 
K. 
L. 
M. 
1125 
1325 
1400 
1475 
1625 
1850 
2000 
Ri0 2 
.05 
.21 
53 84 
.07 
.11 
54. 49 
.62 
43. 29 
.19 
.16 
55. 1-2 
.30 
43. 28 
.06 
.14 
54.48 
.73 
43. 38 
.05 
.17 
53. 90 
1.14 
43. 37 
.03 
.17 
54.28 
1.12 
43. 13 
.07 
Al 2 3 , F e 2 0, 
CaO 
.16 
54 02 
MgO 
CO 
.86 
42.87 
1.06 
43.20 
97.83 
98. 58 
99.05 
98.79 
98. 63 
98.73 
98. 51 
P 2 5 is present. Is included with A1 2 2 and Fe 2 2 . 
N. Supposed cement rock, River Junction. Received from D. T. 
Day. Analysis Iry George Steiger, record No. 1844. 
Si0 2 12. 31 
A1 2 3 12. 19 
Fe 2 3 66 
CaO 26. 28 
MgO 16. 72 
K 2 none 
Na 9 50 
ELOat 100°. 
.94 
P 2 5 05 
CO, 38. 12 
99.82 
