298 
ANALYSES OF ROCKS, V. S. GEOLOGICAL SURVEY. [bull. 168. 
MISSOURI, ARKANSAS. 
A. Typical loess, Kansas City, Missouri. Dried at 100°. Described 
by Chamberlin and Salisbury, 6th Ann., p. 282. Analysis by R. B. 
Riggs, record No. 291. 
B^ C, D, E. Tallow clays, Joplin, Missouri. Collected by W. P. 
Jenney. Analyses by T. M. Chatard, record No. 1210. 
F. Tallow clay, Aurora, Missouri. Collected b}^ Jenney. Analysis 
by Chatard, No. 1210. In analyses B, C, D, E, and F the percentages 
of bases relate to the portion soluble in hydrochloric acid. Analyses 
only partial. 
A. 
B. 
C. 
D. 
E. 
P. 
Insoluble 
40. 64 
43. 07 39. 34 
39. 62 
34. 04 
Si0 2 
AlA 
FeA 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 
Ti0 2 
PA 
MnO 
ZnO 
74.46 
12.26 
3. 25 
.12 
1.12 
1.69 
1.43 
1.83 
2.70 
.14 
.09 
.02 
5.72 
1.30 
7.60 
1.12 
6.17 
1.16 

6. 45 
1.53 
10.01 
3.62 
.27 
1.80 
.32 
1.70 
.27 .30 
2.13 1.77 
.25 
2.09 
17.19 
16.74 
17. 63 
16.95 
16.96 
32.46 
29.43 
34.28 
33. 55 
33.49 
C0 2 
C, organic . . 
so 3 
01. . 
.49 
.12 
.06 
.05 
! 
99. 83 
99. 38 
99. 98 
100. 98 
100.17 
100. 46 
The following partial analyses by H. N. Stokes, record No. 1260, all 
relate to tallow clays collected by W. P. Jenney. The same remarks 
apply as to B, C, D, E, and F. 
G. Cave Springs mine, Jasper County, Missouri. 
H. Great Western mine, Granby, Missouri. 
I, J, K. Woodcock mine, Granby, Missouri. 
L. Coon Hollow, Boone County, Arkansas. 
Material dried at 103°. 
