LARKE.j 
CARBONATE ROCKS. 
TENNESSEE, ALABAMA, LOUISIANA. 
311 
A. Limestone, Knoxville, Tennessee. Analysis by L. G. Eakins, 
record No. 1159. 
B. Knox dolomite, Morrisville, Alabama. Described by Russell in 
Bull. 52, together with a residual clay derived from it. See section on 
clays. Analysis by W. F. Hillebrand, record No. 7^7. 
C. Limestone from Rayborn's salt-lick, Bienville Parish, Louisiana. 
Analysis by R. B. Riggs, record No. 323. 
D. White marble, streaked with black. From 5 miles west of 
Winntield, Louisiana. Analysis by W. F. Hillebrand, record No. 760. 
In addition to the constituents named in the table, this marble con- 
tains traces of barium, strontium, chlorine, and organic matter. 
Insoluble 
Si0 2 
A1A --- 
Fe 2 :i --- 
FeO 
MnO .... 
CaO 
MgO .... 
17 
04 
23 
P.A 
55. 47 
.30 
.21 
2 V 
co 2 
so 3 
43. 63 
100. 05 
3. 24 
.17 
.17 
.06 
. 65 
.55 
1.61 
trace 
29.58 
20.84 
.30 
trace 
54. 09 
.06 
45. 54 
.05 
44.12 
.05 
99.90 100.53 
trace 
.10 
55. 01 
.60 
.13 
43. 43 
.27 
100. 19 
TEXAS. 
Supposed cement rock, Uvalde quadrangle. Collected by T. Way- 
land Vaughan. Analysis by W. F. Hillebrand, record No. 1759. 
A, the rock; B, the part insoluble in dilute nitric acid. 
«A 
FeA, A1A---- 
CaO 
MgO 
C0 2 
Insoluble 
NaCl,Mn, H 2 0« 
.10 
.09 
40.82 
.18 
32. 41 
25. 57 
100.00 
Si0 2 .... 
A1A--- 
FeA -- 
PA.... 
H 2 0.... 
Alkalies 
20. 80 
3.44 
1.14 
.19 
25. 57 
a By difference. 
