116 CEMENT MATERIALS AND INDUSTRY. [bull. 243 
Southern Railway at Fulton by West Saline River, which is navigabh 
to small steamers during a large part of the year. 
BIBLIOGRAPHY OF CEMENT RESOURCES OF ARKANSAS. 
Branner, J. C. On the manufacture of Portland cement. Ann. Kept. Arkansi 
Geol. Survey for 1888, vol. 2, pp. 291-302. 1888. 
Branner. J. C. The cement materials of southwest Arkansas. Trans. Am. Inst 
Min. Eng., vol. 27, pp. 42-63. 1898. 
Branner, J. C. Ckys of Arkansas. Bull. U. S. Geol. Survey. 1905. 
Hopkins, T. C. Marbles and other limestones (of Arkansas). Ann. Kept 
Arkansas Geol. Survey for 1890, vol. 4, 443 pp. 1893. 
Taff, J. A. Chalk of southwestern Arkansas. Twenty-second Ann. Rept. U. i 
Geol. Survey, pt. 3, pp. 687-742. 1902. 
PORTLAISTD-CEMEXT RESOURCES OF CAEIFORKIA.a 
PORTLAND-CEMENT MATERIALS. 
Few extensive belts of limestone are found in California, but numej 
ous comparatively small areas occur, and many of them furnish rod I 
suitable for use as a Portland-cement material. Three Portland-ceineif 
plants are now in operation, and the prospects seem good for a markec 
expansion of the California cement industry. Owing to the lack o 
good native coals and the abundant supply of petroleum, oil is use? 
as fuel. 
DISTRIBUTION. 
Detailed mapping of California geology has been of such a frag 
mentary character that few generalizations can be made regarding th 
occurrence of good cement limestones. The areas in which limestone 
are known to occur are indicated on the accompanying map (PL IV) 
but not all of the areas shown will give material fit for Portlam 
cement; and, on the other hand, deposits of good material probabl; 
exist which do not appear on the map. The map will, however, serv 
as a guide in the location of deposits of available cement materials. 
SAN DIEGO COUNTY. 
Fine-grained, chalk-like limestone occurs near the coast at Jamul 
San Diego County, where it was used about 1888 in a small Portland 
cement plant. Its composition is as follows: 
ii 
11 
a Many of the data in this section, when not otherwise credited, have been abstracted from i. 
valuable reports of the State mineralogist of California. The writer is, however, responsible for 
discussion of the cement industry and of the different plants, all of which were visited during I 
fall of 1903. Mr. J. S. Diller, of the United States Geological Survey, has furnished all the data rel 
ring to (he limestones of the Redding district, and has very kindly located these Shasta Conn 
deposits on the accompanying map. 
