766 



INDEX. 



MOSQUITO FAL'LT, AUEA BETWEEN, AND BALL MOUXT- 



AIN FAULT 



AREA EAST OF 



map explained 



Pass 



road 



Page. 



215 

 209 

 90 

 137 

 130 



Peak 139,142 



Porphyry 83,96,113,125,327 



RANGE 



age of uplift of 31 



amount of displacement in 39 



dynamic movements in 32, 35 



geological history of 30 



topographical description of 27 



volcanic rocks in 39 



section of Paleozoic formations 57 



Mottled porphyry, why so named 383 



Mountain elevation , theory of 24 



STRUCTURE 24 



Mountains and peaks: 



Arkansas 200 



Baldbead 135 



Ball 219, 221, '."j:! 



Bartlett 198,199,201 



Bross 115 



Buckeye (peak) 193 



liuckskin 124,125 



BnSalo (peaks) 28,175,302 



Cameron 115 



Chalk 194,302 



Democrat 124 



Dyer 150,212 



EastBall 215 



Evans 139,214 



Gemini(peaks) 141) 



Green 222,507 



Lamb 1*3 



Lincoln '. 107,110 



Little Bartlett 198 



Little Zion 18 



Mosquito (peak) 139,142 



North (peak) 98 



Peerless 159,182 



Prospect 184,257 



Ptarmigan (peak) 182 



Quandary 98 



Sheep 18 



Sheridan 182 



Sherman 159,210 



Sih-erheels 105 



South (peak) 174 



Spanish (peaks) 306 



West Dyer 214 



Sheridan 212 



Weston's (peak) 1T2 



Zion 186 



MOUNT Zibx PORPHYRY 76,185,323,326 



analysis of 326,358,589 



Mum in- Mountains, Ireland, granite in 309 



MUFFLES, used in assaying 633 



Murray, John, cited 54 



Muscovite, alteration product of biotite 324, 325, 357 



feldspar in sand- 

 stones 68 



N. 



Page. 



NEVADITE 87, ]95, 201, 205, 300, 303, 345,589 



analysis of 349,358,589 



definition of 345 



figured 88 



metallic contents of 581 



sanidine from, figured 348 



topaz in 87,347 



i Newborry, Prof. J. S., cited 54,372,568 



! NEW DISCOVERY MINE 462 



New metal 714 



Nickel in Leadville ores 547,720,724 



separation from cobalt 721,723 



Nigrine in amphibolite 50 



NlLES-AUOUSTA WISE 44:! 



i NON-ABSORPTION OF SEDIMENTARY ROCKS BY ERUP- 

 TIVE MASSES 308 



j No Name pilch 189 



Non-conformity by erosion in Paleozoic 01, 188 



NORTH IRON HILI 248,401 



MOSQUITO AMPHITHEATER 125 



SECTION 131 



Peak ridge 98 



NOTES UPON METHODS OF ANALYSES 589 



THE IlENKY MOUNTAIN HOCKS 359 



O. 



Ohio and Missouri smelter 625, 626, 69.1, 694, 695, 698, 708, 



711,712 



OLDER ERUPTIVES 323 



ORE BEDS 648 



BUYING 627 



currents, direction of 571,57:1 



Deposition, previous to faulting 399 



on Iron tiiult. secondary 400 



DEPOSITS '. 367 



GENESIS OF LEADVILLE 5)9 



manner of occurrence of 540 



ni'Mr of formation of 565 



on Carbonate Hill 411 



Fryer Hill 451,490 



N'otth Iron Hill 404 



leplacement of limestone 406,407 



scientific study of 368 



PROSPECTS IN UNEXPLORED AREAS "]- 



ORES AXD VELX MATERIALS, composition of 543,599 



annual consumption ol'.ltv Mnt-lters (KIT 



deposited as sulphides 562 



of chief mines described 616 



ORIGIN OF METALS in Leadville deposits 379, 569 



BEHPENHNE 282 



structure in eruptive rocks 320 



Orthoclaso in porpbyrite 336,339 



Orthoclastic and plagioclasttc rocks 304 



OTHER GROUPS OF MINES 493 



Outcrop deposits richer than thoso in depth 554 



Output of Leadville mines, tabulated 615 



P. 



PALEOZOIC FORMATIONS 53,277 



orein 541 



sections of 57,133,166,213,381 



Park city .' 131 



province 291 



