MISSOURI. 
225 
Analyses of Mississippian shales, Missouri. 
ica (SiO,) 
umina (A1 2 3 ) 
m oxide (Fe 2 3 ) 
ne (CaO) 
ignesia | Mg( h 
ialies (K 2 0, Na,0).... 
mbined water 
)isture i 
75.70 
9.61 
1.79 
2.54 
2.11 
2.65 
6.16 
n. d. 
2 
3 
4 
5 
56.82 
46.26 
49.69 
59.97 
24.48 
L0.26 
17.40 
21. L5 
:;. 82 
2.65 
4.01 
5.20 
11.08 
8.07 
1 . 55 
1.81 
7.84 
4.16 
1. 10 
3.80 
3.17 
2. 73 
3.88 
8.16 
"18. 02 
13. 37 
5.71 
n. d. 
n. d. 
1. 16 
1 . 25 
55. -4 
22. 78 
5.24 
. 73 
1 . 26 
4. Hi 
9. 84 
n. d. 
a Probably includes C0 2 .— E. C. E. 
Hannibal, Marion County. Missouri Geol. Survey, vol. 2, p. 400. 
Humansville. Polk County. Ibid., p. 406. 
Aldrieh. Polk County. Ibid., p. 407. 
Barrett, St. Louis County. Ibid., p. 422. 
Ste. Genevieve. Ste. Genevieve County. Ibid., p. 11 7. 
Joplin, Jasper County. Ibid., p. 392. 
PENNSYLVANIAN {-'COAL MEASURES") LIMESTONES AND SHALES. 
Almost all of northern and western Missouri is covered by the 
mnsylvanian series ("Coal Measures"), which overlie the Mississip- 
|n rocks last described. The Pennsylvanian series consists of thick 
ries of shales and sandstones, with occasional thin beds of limestone 
d numerous coal seams. In the present connection this geologic 
ries is of interest chiefly as a source of fuel and shales, though it is 
ssible that some of its limestones may be also of value as cement 
ite rials. 
The following analysis is of a limestone which overlies the Meadows 
al seam in Lincoln County. This limestone bed varies in thick- 
ss from ± to 6 feet. As shown by the analysis, it is highly sili- 
ous, though very low in magnesia. Judging from experience else- 
lere, the Pennsylvanian limestones will probably be found in most 
ses sufficiently low in magnesia to be available for use as Portland- 
ment materials. They occur almost invariably in thin beds, bow- 
er, and it is usually necessary to excavate them by mining. Their 
mmon advantage is, of course, that they are found in close proximity 
coal beds and to shales. 
Analysis of Pennsylvanian limestone, Missouri." 
ica (Si0 2 ) 21.35 
>n oxide (Fe 2 O s ) - 1-79 
me (CaO) 42. 16 
ignesia (MgO) 66 
.rbon dioxide (C0 2 ) :'»4. 14 
a Lincoln County. Chauvenet, analyst. Rept. Missouri Geol. Survey, 1872, p. 287. 
Bull. 243—05 15 
