54 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
Cornforth, J. T. 
580. Alaska and its possibilities. — Am. Min. Congr., Kept, of Proc, 9th 
Ann. Sess., pp. 260-263, 1907. 
Includes notes on the mineral resources. 
Coste, Eugene. 
581. Natural gas and petroleum [in Ontario]. — Ontario. Bur. Mines, Rept. 
1906, vol. 15, pt. 1, pp. 108-115, 1906. 
Includes records of borings. 
582. The new Tilbury and Ronmey oil fields of Kent County, Ontario. — 
Canadian Min. Jour., vol. 28, no. 11 (new ser., vol. 1, no. 9), pp. 265-268, July 
15, 1907. 
583. Tbe Tilbury oil field, Ontario. — Eng. and Min. Jour., vol. 84, p. 779, 
October 26, 1907. 
Courtis, William M. 
584. The Cobalt mining district. — Eng. and Min. Jour., vol. 82, pp. 5-6, 
5 figs., July 7. 1906. 
Includes notes on the geology, and the occurrence and character of the ores of Cobalt, 
Ontario. 
585. The Priest Lake mining district, Idaho. — Eng. and Min. Jour., vol. 82, 
p. 866, November 10, 1906. 
Contains notes on the general geology and the character of the ore deposits. 
Courtis, W. M. 
586. Gold in Michigan. — Michigan State Board of Geol. Survey, Rept. for 
1906, pp. 581-584, 1907. 
Crafts, H. A. 
587. Some features of the great earthquake. — Sci. Am., vol. 94, p. 383, May 
12, 1906. * 
Craig, E. H. Cunningham. 
588. Geological structure of Trinidad. — Imperial Inst., Bull., vol. 5, no. 2, 
pp. 175-179, 1907. 
Crandall, Albert R. 
589. The coals of the Big Sandy Valley, south of Louisa and between Tug 
Fork and the headwaters of the north fork of Kentucky River. — Kentucky 
Geol. Survey, Bull. no. 4, 141 pp., 30 pis., 1905. 
Describes the general geology and topography of the area, the occurrence, character, 
thickness, and relations of the coal seams, giving numerous sections, and the character 
and composition of the coals, 
Crandall, Roderic. 
590. The Cretaceous stratigraphy of the Santa Clara Valley region in 
California.— Am. Jour. Sci., 4th ser., vol. 24, pp. 33-54, 3 figs.. July, 1907. 
Describes the occurrence of Cretaceous formations and gives lists of the fossils found 
in different exposures. 
591. The geology of the San Francisco Peninsula. — Am. Philos. Soc, Proc, 
vol. 46, no. 185, pp. 3-58, 1 pi. (map), 3 figs, and sections, 1907. 
Describes the geologic formations and the petrography of their rocks, the geologic 
structure and physiographic features, and the earth movements in the San Francisco 
earthquake of April IS, 1906. 
Crane, W. R. 
592. Asphaltic coals in the Indian Territory: forms of the deposits, methods 
of prospecting and mining. — Mines and Minerals, vol. 26, no. 6, pp. 252-254, (5 
figs., January, 1906. 
Describes the distribution, relations, and character of the coal deposits. 
