88 
CEMENT MATERIALS AND INDUSTRY. 
[BULL. 243. 
A number of samples of limestone from various points along or neai 
Gila River, near projected dams for irrigation purposes, were exam- 
ined by Mr. E. Duryee, with a view to determining their value as Port- 
land-cement materials. These analyses are given in the following table 
Analyses of limestone near Gila River, Arizona. 
[E. Duryee, analyst.] 
Silica(Si0 2 ) 1.4 
Alumina (A1 2 3 ) \\ 
Iron oxide (Fe 2 3 ) J 
Lime carbonate ( CaC0 3 ) 96. 65 
Magnesium carbonate ( MgC0 3 ) ] 
Water 65 
3.7 
6.0 
55.92 
31.00 
1.00 
4.7 
1.4 
93.10 
4.1 
5.8 
90.10 
34.6 
1. 
55. 
1. San Carlos, gray. 
2. San Carlos, pink. 
3. Riverside, blue. 
4. Queen Creek, blue. 
5. Queen Creek, gray. 
BIBLIOGRAPHY OF CEMENT RESOURCES OF ARIZONA. 
Davis, A. P., and Duryee, E. Tests of cement materials from Salt Kiver, Arizom 
Water Supply and Irr. Paper U. S. Geol. Survey No. 73, pp. 48-51. 1903. 
Duryee, E. Tests of cement materials from Gila River, Arizona. Water Supply 
and Irr. Paper U. S. Geol. Survey No. 33, pp. 82-90. 1900. 
Duryee, E. Cement investigations in Arizona. Bull. U. S. Geol. Survey No. 213, 
pp. 372-380. 1903. 
Ransom e, F. L. Geology of the Globe copper district, Arizona. Pyof. Paper U. Sa 
Geol. Survey No. 12. 168 pp. 1903. 
Ransome, F. L. Geology and ore deposits of the Bisbee quadrangle, Arizona. 
Prof. Paper U. S. Geol. Survey No. 21. 168 pp. 1904. 
PORTLAND-CEMENT RESOURCES OF ARKANSAS. « 
PORTLAND-CEMENT MATERIALS. 
A number of limestone formations occur in Arkansas, six of which 
seem to be worth considering as possible sources of cement materials. 
The limestones which will be described are the following: 
Geologic age. 
Izard limestone Ordovician i| 
Polk Bayou limestone Ordovician 
St. Clair limestone I Silurian 
Boone limestones Mississippian (Lower Carboniferous) 
Pitkin or Archimedes limestone Mississippian (Lower Carboniferous) 
White Cliffs chalk Cretaceous 
Saratoga chalk Cretaceous 
"The Silurian and Carboniferous limestones-are discussed by T. C Hopkins in a report on the mar- 
bles and other limestones of Arkansas, published as Vol. IV of the Report Arkansas Geol. Survey for 
1890. The Cretaceous chalks, as later noted, have been described in detail by J. A. Taff, in a report 
issued by the U. S. Geol. Survey. The descriptions of Arkansas limestones given in the following 
pages arc abstracted from the two reports named. Mr. E. O. Ulrich has kindly furnished many data 
concerning the Paleozoic limestones. 
