BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 15 
Angermann, Ernesto — Continued. 
51. Sobre la geologia de la Bufa, Mapimi, Estado de Durango [Mexico].— 
Mexico, Inst. Geol., Parergones, t. 2, no. 1, pp. 17-25, 1 pi., 1 fig., 1907. 
Describes the geologic structure, and the occurrence and relations of Cretaceous, Ter- 
tiary, and Quaternary deposits. 
52. Notas geologicas sobre el Cretaceo en el Estado de Colima [Mexico]. — 
Mexico, Inst. Geol., Parergones, t. 2, no. 1, pp. 29-35, 1 pi., 1907. 
Describes the occurrence and relations of Cretaceous strata in the State of Colima, 
Mexico. 
Anonymous papers. See page 208. 
Arey, Melvin E. 
53. Geology of Black Hawk County [Iowa]. — Iowa Geol. Survey, vol. 16, 
pp. 407-152, 1 pi., 4 figs., geol. map, 1906. 
Describes the topography and drainage, the stratigraphy, including Devonian rocks and 
glacial deposits, and the economic products. 
Arg-all, Philip. 
54. Report on the zinc mines of the east and west Kootenays. — Canada, 
Dept. of the Interior, Mines Branch, Rept. of the Commission to investigate the 
zinc resources of British Columbia, pp. 147-252, 51 pis., 32 figs., 1906. 
Includes notes on the character, occurrence, and geologic horizon of the zinc ores. 
Arming-ton, Howard C, and Stotesbury, Harold W. 
55. The Yak mining, milling, and tunneling company [Leadville, Colo.]. — 
Colorado School of Mines, Bull., vol. 4, no. 1, pp. 71-88, 10 figs., 1907. 
Includes an account of the local geology. 
Arnold, Ralph. 
56. Geological reconnaissance of the coast of the Olympic Peninsula, Wash- 
ington.— Geol. Soc. America, Bull., vol. 17, pp. 451-168, 4 pis., 4 figs., 1906. 
Notes briefly the literature bearing on the region and describes its physical features, 
the character, occurrence, and relations of Tertiary and older formations, and the gen- 
eral geologic structure. 
57. The Tertiary and Quaternary pectens of California. — U. S. Geol. Survey, 
Prof. Paper no. 47, 264 pp., 53 pis., 2 figs., 1906. 
Gives an account — nomenclature, definition, localities, and faunal lists — of the Ter- 
tiary and Pleistocene formations of California and systematic descriptions of the pectens. 
58. Coal in the Mount Diablo Range, Monterey County, Cal. — U. S. Geol. 
Survey, Bull. no. 285, pp. 223-225, 1 fig., 1906. 
Describes the geologic structure of the range, the relations of the coal bed, and the 
properties of the coal. 
59. The Salt Lake oil field near Los Angeles, Cal.— U. S. Geol. Survey, Bull, 
no. 285, pp. 357-361, 1 fig., 1906. 
Describes the geologic formations and structure of the area, and the economic de- 
velopments. 
60. New and characteristic species of fossil mollusks from the oil-bearing 
Tertiary formations of southern California. — IT. S. Nat. Mus., Proc., vol. 32, 
pp. 525-546, 14 pis., June 15, 1907. 
61. Dome structure in conglomerate. — Jour. Geology, vol. 15, no. 6, pp. 560- 
570, 8 figs., 1907. 
Describes the structure of domes in conglomerate near Pasadena, Cal., ana discusses 
the origin of dome structure. 
62. Fossils of the oil-bearing formations of southern California. — U. s. <;<>-.!. 
Survey, Bull. no. 309, pp. 219-256, 17 ]>ls., 1!>07. 
(Jives figures of characteristic species <»f fossils, chiefly Pelecypoda and Gastropoda 
from Tertiary horizons of southern California. 
