310 
CEMENT MATEEIALS AND INDUSTRY. 
I BULL. 243. 
. 
PORTLAND-CEMENT INDUSTRY IN TEXAS. 
Three cement mills have been started in Texas, located at Austin, 
Dallas, and San Antonio, respectively. All of these mills hav T e sew 
limestone from the Cretaceous beds. The Austin plant has been shut 
down for some time; the Dallas plant has recently been purchased by( 
the lola Portland Cement Company of Kansas. 
PORTLAND-CEMENT RESOURCES OF UTAH. 
Limestones, usually low in magnesium carbonate, occur at manwJl 
points in the Wahsatcb Mountain area in Utah. Most of these lim^B, 
stones are of Carboniferous age. Frequently they contain so much ij, 
clayey matter as to fall below 75 per cent in lime carbonate, in which 
case they are to be regarded as approaching the Lehigh cement rock ; 
(see Pennsylvania) in composition. A rock of this type would require 
the addition of a purer limestone in order to bring it up to the proper 
percentage of lime for a Portland-cement mixture. 
In the Plateau district softer limestones, of Eocene and later ages 
occur. 
Analyses of limestones from Utah. 
l 
2 
a 
4 
5 
6 
7 
s 
" 
Silica (SiOj) 
0. 57 
17.19 
4. 33 
2. 37 
27. 94 
13.01 
5. 89 
4. 03 
19.24 
Alumina (A1 2 3 ) n. d. 
Iron oxide ( Fe 2 3 ) .90 
n. d. 
.48 
n. d. 
. 63 
} . 25 
.35 
3. 72 
1.09 
.2o{ 
:;.26 i 
1.09 
Lime (CaO) 55.22 
43. 78 
52. 34 
53. 09 
39. 54 
43. 23 
42. 49 
51. 33 
::s.94 
Magnesia ( MgO ) 
.41 
.91 
.60 
1.20 
.29 
2. 18 
8. 50 
.72 
2.75 
Alkalies (K 2 0, Na,0) . 
n. d. 
n. d. 
n. d. 
u. d. 
n. d. 
n. d. 
u. d. 
. 63 
Tr. 
Sulphur trioxide(S< > : . ) . 
m d. 
n. d. 
n. d. 
n. d. 
n. d. 
n. d. 

.89 
.53 
Carbon dioxide (CO, ) . 43. 84 
35. 40 
-11.7s 
42. ss 
31.69 
36. 20 
n. d. 
41.07 
29.57 
Water 
n. d. 
n. d. 
n. d. 
. 22 
.25 
1.17 
n. d. 
.83 
1.67 
Organic matter 
.27 
2.96 
;■ 
1. Carboniferous limestone, Mammoth Peak, Tintie district, Nineteenth Ann. Rept. U. S. Geol. Sli 
vey, pi. '.!, i>. 625. 
2. Carboniferous limestone, Sioux Peak, Tintie district, Nineteenth Ann. Rept. U. S. Geol. Surve 
pt. 2, ]>. 626. 
3. Carboniferous limestone, Eureka Peak, Tintie district, Nineteenth Ann. Rept. U. S. Geol. Surva 
pt. 2, p. 623. 
4. Carboniferous limestone head of Mill Canyon: B. E. Brewster, analyst. Rept. Fortieth Paral 
Survey, vol. 2, p. 376. 
5. Carboniferous limestone, lite Peak: B. E. Brewster, analyst, Rept. Fortieth Parallel Survey, v( 
2, p. 288. 
6. Silurian (?) limestone, base of Ute Peak; B. E. Brewster, analyst. Rept, Fortieth Parallel Su^ 
vey, vol. 2, p. 411. 
7. Eocene limestone, Manti: Geo. Steiger, analyst. 
8. Oolitic sand, shores of Salt Lake: T. M. Chatard, analyst. Bull. U. S. Geol. Survey No. 27, p. 
9. Calcareous adobe soil, Salt Lake City: L. G. Eakins, analyst. Bull. P. S. Geol. Survey, No. 
p. 51. 
One cement plant is at present in operation in Utah. This is the i 
mill of the Portland Cement Company of Utah, located in Salt Lake 
City. The quarry from which the raw materials are obtained is 
Parleys Canyon, several miles southeast of the city. Two types 
