ransom e. J LITERATURE RELATING TO THE REGION. 17 
Kedzie, G. E. The bedded ore deposits of Red Mountain mining 
district, Ouray County, Colo.: Trans. Am. Inst. Min. Eng., Vol. 
XVI, 1887-88, pp. 570-581. 
Classifies deposits in northern San Juan County as fissure veins, ''chimneys," 
and '-bedded " or " contact " deposits. Describes the deposit of the Saratoga mine 
as of the latter class. 
SCHWARZ, T. E. Notes on the ore occurrence of the Red Mountain 
district: Proc. Colo. Sci. Soc, Vol. Ill, 18S8, pp. 77-85. 
Ascribes Red Mountain deposits to hot spring- action. Describes changes in ore 
bodies, character of ores, and origin of ore caves. 
Emmons, S. F. Structural relations of ore deposits: Trans. Am. Inst. 
Min. Eng., Vol. XVI, 1888, pp. 804-839. 
Describes ore body cf Yankee Girl mine and criticises the speculative state- 
ments of T. B. Comstock. Discusses fractures and their causes. Refers to zones 
cf sheeting in the rocks of the San Juan. Suggests that complicated systems of 
fractures there found seem to require torsional strains for their formation. 
Comstock, T. B. Hot spring formations in tin 1 Red Mountain dis- 
trict, Colorado: Trans. Am. Inst. Min. Eng., Vol. XVII, 1888- 
89, pp. 261-264. 
A reply to criticism by Mr. S. F. Emmons. 
Hills, R. C. Orographic and structural features of Rocky Mountain 
geology: Proc. Colo. Sci. Soc, Vol. III. L888-1890, pp. 362-458. 
A few references of general character to the geology of the San Juan region, 
Schwarz, T. E. The ore deposits of Red Mountain, Ouray County, 
Colo.: Trans. Am. [nst. Min. Eng., Vol. XVIII, 1889-90, pp. 139- 
145. 
A careful general description of the peculiar deposits characteristic of the Red 
Mountain district. Some hypotheses are advanced, but the value of the paper 
lie? in the facts presented relative to the main ore bodies, which are no longer 
accessible. 
Keller, PI. E. Ueber Kobeilit von Ouray, Colorado, und tiber die 
chemische Zusammensetzung dieser species : Zeitschrift fur Kry- 
stallographie, Vol. XVII, L890, pp. 67-72. 
Describes kobellite from the Silver Belle mine. 
AROALL, PHILIP. Discussion of paper by P. II. Van Diest: Proc. 
Colo. Sci. Soc, Vol. IV, 1891-1893, p. 353. 
States that in the San Juan region many of the mineral veins in the eruptive 
rocks occupy fissures of contraction and do not extend into the underlying rocks. 
Bancroft, H. H. History of Nevada, Colorado, and Wyoming; San 
Francisco, 1890, pp. 495-503. 
Sketch of early history of San Juan region. 
Hills, R. C. Types of past eruptions in the Rocky Mountains : Proc. 
Colo. Sci. Soc, Vol. IV, 1891-1893, p. 25. 
San Juan Mountains said to correspond to Tushar type, of Powell, carved from 
thick volcanic masses in nearly horizontal attitudes. 
Hall, Frank. History of Colorado, Vols. II-IV; Chicago, 1890-1895. 
Early history of prospecting in the San Juan. 
Bull. 182—01 2 
