504 
INDEX. 
Page. 
Gold Dollar vein, location and description of. 360 
Golden Cycle mine, description of. 424-429 
gas in. 260,426 
geology of. 426-427 
location of. 5,408,425-426 
metasomatism in. 190,191-192 
minerals in. 182,191 
ore of.•.. 172,212-213,428-429 
analyses of. 172 
oxidation in.i. - 198,428 
production of. 149-426 
rocks in. 29,32-33,190 
analysis of. 192 
veins of. 156,160,161,424,427-428 
structure of. 428-429 
figures showing. 160 
view of. 416 
workings in.. 408,426 
figure showing. 428 
water level in..*.. 240,245.246 
change in, figure showing. 242 
Golden Cycle Mining Company, mine of. 424 
Golden Discovery claim, location of. 487 
Goldfield, mines near. 5,387-429 
view of. 34,416 
drainage of. 9,235,244 
location of. 291 
Gold Hill, mines on, description of. 5,148,287,291-313 
mines on, production of. 135 
north slope of, view of. 292 
oxidation on. 198 
rocks on. 25-26,32,34,70,147,291 
view from.. 18 
workings in. 291 
Gold King dike, location and description of. 274-275,277 
Gold King Gold Mining Company, mine of. 273 
Gold King mine, description of. 273-274 
drainage of. 273 
history of. 131,148,273 
location of. 5,148,272,273 
minerals in. 116,126 
ores of. 273-274 
oxidation in. 198 
production of. 273 
veins of. 273 
water level in. 240,273 
• change in, figure showing. 242 
workings of. 273 
Gold King vein, character of?. 272 
Gold Knob shaft, location and description of. 426 
Gold Pass claim, location of. 292 
Gold Pass dike, location and description of.. 275-276,277,278 
Gold Run, prospects on. 150 
Gold Sovereign mine, description of. 367-369 
dike in. 95,368 
location of. 367 
metasomatism in. 190 
minerals in. 120 
ore of. 211,368-369 
photomicrograph of. 186 
oxidation in. 198 
production of. 367 
rocks in. 33 
veins of. 367-368 
Gold Sovereign Mining and Tunnel Company, mines of. 367 
Gold Sovereign vein, character of. 362 
Gold Watch vein, location and description of.. 496 
Page. 
Goodwill tunnel, location and description of. 291,292 
rocks in. 25,293 
Gortner, M. C., mine of. 274 
Grafton Gold Mining Company, mine of. 286 
Granfield, Horace, mine of. 355 
Granite, age of. 47-48 
alteration of. 184,192,193-195 
analyses of. 45,101-102,196,483 
breccia and, contact of. 25-30 
breccia of. 99 
description of... 1,3,43,45-46,47 
divisions of. 3,43 
occurrence of. 1, passim 276-496 
intiusions on. 24,35 
occurrence of. 1, passim 276-496 
ore bodies in, figures showing. 213,338 
petrology of. 43-45,46-47 
See also Pikes Peak granite; Cripple Creek granite; Spring 
Creek granite. 
Granite Gold Mining Company, mine of. 471 
Granite mine, description of. 471-475 
dikes in.. 34,95,473,477 
geology of. 472-473 
location of. 5,150,471 
ore of. ; . 213,473-475 
production of. 471 
rocks in. 27,85 
veins in, character of.. 162,179,206,471-472,474-475 
water in. 475 
workings of..'.. 471 
Granite ore, analysis of. 172 
character of. 7,193-194,473-475 
deposition in. 229 
Occurrence of. 338-339,360-361,473 
Granite vein, location and description of. 471-472,474 
Grant, L. S., data from. 394 
Grant vein, location and description of. 158, 
165,452,456,462,463 
Graton, L. C., on description and petrology of meta- 
morphic and igneops rocks. 41-113 
work of. 14,18,20,22 
Great Westerh claim, location and description of. 283 
Gregory claim, location of. 331 
workings on. 332 
Grouse Hill, prospects on. 150,495-496 
rocks of. 19,22,34,37,38,57,495 
section through Straub Mountain and, figure 
showing. 37 
view of. 350 
Grouse shaft, rocks in. 382 
Guyot Hill, mines on. 330 
mines on, production of. 135 
Gypsum, description of. 125 
occurrence of. 4,114,197,284-285 
origin of. 201,220 
H. 
Half Moon mine, description of. 292,297 
history of. 292 
location of. 5,148 
production of. 148,292 
veins in. 297 
workings in, plan showing.!. 295 
Half Moon vein, location of. 275 
Hallett & Hamburg claim, location of. 478 
Hammond, J. H., advice of. 450 
Happy Thought mine, gas in. 259-260 
