S 
ILLUSTRATIONS. 
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Plate I. Topographical map of Cripple Creek district. In pocket. 
II! Geological map of Cripple Creek district, with sections. In pocket. 
III. Plan of principal underground workings at Cripple Creek. In pocket. 
IV. ’- A, Cripple Creek, looking west from Gold Hill; B, Cripple Creek, looking northeast. 18 
VY Plan of part of the underground workings of the Battle Mountain mines. 26 
VI. A, Town of Victor, from Squaw Mountain; B, Battle Mountain mines, from Squaw 
Mountain. 34 
VII. A, B, C, D, Photomicrographs of phonolite. 60 
VIII. A, B, C, D, Photomicrographs of latite-phonolite, syenite, and trachydolerite. 82 
IX: .4, B, C, Photomicrographs of trachydolerite, monchiquite, and vogesite. 94 
X.' Diagram showing composition of rocks of Cripple Creek. 112 
XI. Section across the Cripple Creek district from the Abe Lincoln mine to Stratton’s 
Independence mine. 148 
XII. Plan of the principal fissures of the Cripple Creek district, shown as intersecting a 
plane 9,500 feet above sea level. 154 
XIII. A, B, Vein structure, Conundrum mine. 160 
XIV. v A, B, Vein structure, Portland mine. 162 
XV/M, B, Vein structure, Portland mine. 164 
XVI/ A, Vein structure, surface workings showing Anaconda vein; B, Vein structure, basic 
dike, Portland mine. 166 
XVII! A, B, C, D, E, Photomicrographs of ores. 180 
XVIII! A, B, Photomicrographs of ores. 186 
XIX. Diagram showing the shape and vertical range of some of the principal ore shoots of 
the Cripple Creek district. 206 
XX. Diagram showing the water level at various times in the principal mines of Cripple 
Creek. 242 
XXI.' .4, Rhyolite Mountain from summit of Bull Hill; B, Pikes Peak and the town of 
Gillett from the summit of Bull Hill. 280 
XXII! A, North slope of Gold Hill; B, West slope of Raven Hill, showing the Doctor- 
Jackpot and Morning Glory group of mines. 292 
XXIII. Elkton mine and south slope of Raven Hill. 332 
XXIV/ A , The El Paso, C. K. & N., Old Gold, and Henry Adney mines on Beacon Hill; 
B, Beacon and Grouse hills from Raven Hill. 350 
XXV. A, South slope of Bull Hill as seen from Squaw Mountain; B, Bull Cliff and town of 
Independence. 362 
XXVI. A, Golden Cycle mine and part of town of Goldfield; B, Stratton’s Independence 
and Strong mines. 416 
XXVII. The Portland mine from the south. 430 
XXVIII. 1 Geological map of the 500-foot level of the Portland mine. 434 
XXIX. Vertical section through the Burns shaft, Portland mine. 440 
13001—No. 54—06-2 
XVII 
