417 



Pagu. 



ProjijHict Teak, fuwlt 15 



Ridge, Cambrian rocks 21 



description 19 



section 102 



structure 20, 99, 107 



Pnmice and Tuff 238 



Pumice.'* at Homitos Cone 239 



Purple Hill. rh}oliU> 380 



Pyrites 310 



Pyroxene in basalt 387 



pyroiene-andesite 355, 362 



Pyroxcne-andesite and basalt, relative age of 252 



ajiatite in 359 



augite in 356 



Augusta Kange 260 



biiititc in 359. 383 



Cliff Hills 154,239,361 



CorU:7. Range 260 



fi'kl.sparin 349,361 



bornblende in 358. 363 



liypcrstheue in 356,362 



in Great Basin, age of 200 



magnetite in 359,363 



mineral composition 239 



Mt. Davidson 281 



olivine in 364 



pyroxene in 355,362 



«iuartz in 360, 363 



Richmond Mountain 233, 239, 348 



Sboallone Range 261 



tridymite in 360 



Truckee Canyon 260 



tuff 385 



Wahweah Raugo 260 



Pyroxenic magma 254, 255 



Q 



Quartz and sanidine in rbyoiite. iutergrowtb of :t7,'j 



conglomerate, with secondary enlargement of 



quartz gr.aiu8 340 



grains, recrystallization of 55 



in andositic-jiearlite and dacite 370 



basalt 390,393 



basic lavas 263 



granite 337 



granite-porphyry 339 



liombleode-mica-andesite 366 



jiy roiene-andesite 360, 363 



rbyolit« 376 



Peak, Pahranagat Range 197 



Quartznorphyry . i 220, 345 



Aiiams Hill 221 



KuUwhacker Mine 221 



Ruby Hill 117 



Quaternary valleys 31 



R. 



Ravens Nest, Pinou Range 200 



Riivincs in Nevada limestone 148 



Red Ridge, Silverado Hills 150 



Rescue Canyon rbyoiite 237, 379 



fault 14, 18, 151, 154 



displacement 19 



Hill 73,79.80.152 



Rbyoiite. absence of ferro-magnesian minerals 268 



iigeof 2-6 



MON XX 27 



Page. 



Rbyoiite, allanite in 262,379 



along Hooaac fault 244 



Jackson fault 300 



Ruby Hill fault 244, 3M 



and basalt, differentiation of 286, 291 



ore, relative age of 309 



biotite in 376 



Hrown's Canyon 137 



clays :104 



cutting Hoosac Mountain 113 



dike in Dunderberg Mine 30i» 



dikes on Pro-spect Ridge 247 



encircling Albambra Hills 153 



feldspar in 375 



feldspar microlites in 378 



garnet in 262,377,379 



Mahogany Hills 137 



microscopical character 374 



mineral composition 237 



penetrating bomblende-iindesite 250 



pbysic^U features 237 



plagioclaae in 376, 370 



Purple Mountain 238.300 



quartz in 376 



sanidine in 375, 379 



zircon in 377 



Rhyolitic pesirlite 378 



pumice 380 



allanite in 381 



in contact with basalt 881-885 



Hichmond Miue, Cambrian fossils 43. 118 



Mountain, altitude 4 



and Cliff Hills compared liiA 



andcsite ....240,348 



basalt ....252.386 



description 25. 240 



fauna 90 



Junction of fanl t lines 271 



liuiest4ine 167 



pyroxeue-andesite 212 



rhyolitic lunnice 381 



sourceof lava 271 



Richlbofcu. R von, cliLssiflcation of rhyolites 374 



origin of igneous rocks 275 



Roberta Peak Mountains 3.203 



Rosenbuscb, H.. cited 342,389 



Rotb, Justus, origin of igneous rocks 274,275 



Rouudtop Mountain Ill 



Ruby Hill fault 17,101,302,307 



ore deposits 301 



quartz.porphjT.v 117 



region 115 



underground drainage channels 315 



S. 



Salt Lake, altitude 



,Sanidine in audesitic pearlite 234 



rbyoiite 375.379 



Scbell t^roek Mountjiins 47 



Secondary dikes, granitc-porph,VTy 222 



tissnreon Ruby Hill 305 



Secret ('luiyou. description 109 



shale 38 



description 39 



thickness 39 



Sentinel Peak 69.79 



