jjEEKs] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1904. 63 
derrick (Clarence Luther) — Continued. 
Lake Otero, an ancient salt lake basin in southeastern New Mexico. 
Am. Geol., vol. 34, pp. 174-189, 1 pi., 3 figs., 1904. 
Describes the geologic structure and history, physiographic features, and eco- 
nomic resources of the region, the character and relations of the formations 
present, and the extent and history of the ancient lake Otero. 
ferrick (H. N.) 
Gypsum deposits in New Mexico. 
U. S. Geol. Surv., Bull. no. 223, pp. 89-99, 1 pi., 9 figs., 1904. 
Describes character, occurrence, and geologic relations of the gypsum deposits 
of New Mexico. 
(Cershey (Oscar PL). 
The Bragdon formation in northwestern California. 
Am. Geol., vol. 33, pp. 248-256, 347-360, 1904. 
Discusses the occurrence, character, and geologic relations of the Bragdon and 
associated formations, and presents evidences of the age of the Bragdon, 
which is affirmed to be Jurassic. 
I The river terraces of the Orleans basin, California. 
Cal. Univ., Dept. Geol., Bull., vol. 3, pp. 423-475, 1904. 
Outlines briefly the bed-rock geology and geomorphogeny of the region, gives 
detailed descriptions of the occurrence and characteristic features of the ter- 
race remnants, and discusses the problems presented by them and their cor- 
relation with the Quaternary terrace system of other portions of California. 
!ill (Benjamin F.). 
Gypsum deposits in Texas, 
U. S. Geol. Surv., Bull. no. 223, pp. 68-73, 1 fig., 1904. 
Describes character, occurrence, and economic development of gypsum deposits 
in Texas. 
Das Vorkommen der texanischen Quecksilbermineralien. 
Zeitsch. f. Krystal. u. Min., Bd. 39, pp. 1-2, 1904. 
Describes the occurrence in Texas of minerals containing quicksilver. 
ill (Robert T.). 
The Guanajuato mining district [Mexico]. 
Eng. & Mg. Jour., vol. 77, pp. 599-601, 642-644, 7 figs., 1904. 
Includes observations on the geology of the region and the occurrence and 
character of the gold and silver ores. 
Report upon the geology of the Santo Domingo placer tields, Mag- 
dalena district, Sonora, Mexico. 
Greene Consolidated Gold Company [Prospectus], New York, pp. 12-24, 10 
pis., 1904. 
Describes the location and general geology of the district, and the character, 
occurrence, and geologic relations of sedimentary formations, of igneous 
rocks, and of placer gold deposits, and discusses the source of the gold. 
tille(F.). 
The Baraboo iron ore. 
Eng. & Mg. Jour., vol. 77, p. 875, 1904. 
Discusses the geologic age and origin of the iron ores of Baraboo, Wisconsin. 
