170 
CEMENT MATERIALS AND INDUSTRY. 
[BULL. 24.°, 
and furnishes a convenient and durable structural material for that part of the Stat 
which prevents other stone from being shipped in. Here, aselsewhere, local demanc 
are not so great now as they formerly were, but every year thousands of dollars' wortl 
of the rock are quarried and used for various purposes, principally for supplying 
fence posts. 
Analyses of Cretaceous limestones from Kansas. 
Silica (SiO,) 
Alumina (A1 2 3 ) 
Iron oxide (Fe 2 3 ) 
Lime carbonate (CaC0 3 ) 
Magnesium carbonate (MgCO 
Water 
4.81 
3. 07 
90.63 
.84 
.08 
5. 
2. 08 
91.30 
.87 
.44 
1. Coolidge, Hamilton County. 
2. Jetmore, Hodgeman County. 
Mineral Resources of Kansas, ]<s ( .)7, p. 78. 
Ibid. 
PORTLAND-CEMENT INDUSTRY IN KANSAS. 
Two Portland-cement plants are now in operation at or near Iola 
Allen County, while a third is in prospect, to be located at lnele ■! 
pendence, Montgomery County. Both of the present plants (as weli 
as the one projected) use Carboniferous limestones and shales. WhiLi 
the materials are very satisfactory, there is nothing strikingly advann| 
tageous in their use. The particular advantage possessed by th 
Kansas plants is derived not from the use of especially good ra^ 
materials, though the limestones and shells are satisfactory enough 
but from the fact that the plants are located in a natural-gas are 
and are therefore supplied with cheap fuel. 
The materials used at the two plants now in operation give th 
following representative analyses: 
Analyses of limestones and shales used for cement making hi Kansas. 
: 
Silica (Si<),) L 
Alumina ( A1 2 3 ) / °" 86 
Iron oxide (Fe 2 3 ) . .. 29 
Lime (CaO) 55. 74 
Magnesia (MgO) . 51 
Carbon dioxide ( CO, ) 42. 76 
Water 04 
2 
3 
1.19 
\ .95 
54. 18 
19. 17 
1.28 
6.11 
53. 13 
7. 05 
L.36 
1.89 
1 42. 66 
11. 95 
1,1 
1.8 
51.7 
2.0 
43.3 
:> 
56. 
22.1 
8.0 
1.1 
io.: 
1. Limestone from Iola, Kansas. H. N. Stokes, analyst, Bull. IT. S. Geol. Survey No. 78. \>. 124. 
2. Limestone used by Iola Portland Cement Company. 
3. Shale used by Iola Portland Cement Company. 
4. Limestone used by Kansas Portland Cement Company. 
5. Shale used by Kansas Portland Cement Company. 
