41S 



Serpentinization of oHviue 388 



Shale beds iu Prospf ct Mouiitaiu limestone 38 



Shallow water deposits. White Pine shale 6ft 



Sierra Canyon, andesitic pearlite and dacite of H68 



Pogoiup fauna 130 



fault 20 



Valley, a center of eruption 131 



Prospei-t Mountain linu'stont' 129 



Si o;nal Peak, structure 144 



Silica in basalt 259 



Siliceous beds at Eureka 178 



Silurian and County Peak fjirouj) 26 



at Highland Range 194 



Quartz Peak 199 



iu British Ameriea 208 



Palirauagnt Rang.-. 196 



Valhy 195 



rocks :^4. 47 



Silver in Ruby Hill ore 312 



Peak, Olenellus shale 46 



Silverado and County Peak 25, U9 



Silverado Hills 149 



Soil 5 



Sorby. H. C, secondary enlargement of quartz. 



Spanish Mountain 



structure 



Spherulites in andesitic pearlite and dacite 



Spring Hill, grouping of fossils 



j'egion of , 



structure 



syneliual fold 



Valley 



r;iMl1 



St. John faun:t . 46 



Stampede Gap 187 



Strahleuberg 25 



basalt 386 



Stratitied limestone, Richmond Mine 37 



Structural mndifieations of granite-por)>hyry 342. 343. 344 



features 209-217 



variations in granite-porphyry 225 



Structure of Timpabute Range 188 



Weber conglomerate 102 



Sugar Loaf 09. 83, 151 



Sulpliides filling fissures 294 



on Ruby Hill 310 



Surjtrise Peak 108 



Pogonip fauna 53 



Syneliual fold, Spring Hill ... 29 



Syndine in VTeber conglonuTji. 162 



on Combs Peak 136 



west of "Wood Cone 122 



T. 

 Table Mountain, structure.... 133 



Tellurium on Prospect Ridgi-. . 313 



Temple Peak, structure 137 



Tertiary age of eruptions 232 



and post Tertiary Volcanic Rocks 2Sb-291 



lavas 30 



The Gate, Pifion Range 83_ 144 



Thickness of beds at Diamond Peak 158 



Carboniferous 13, 84 



Devon ian 13, 63 



Combs Peak 78 



Diamond Peak fpiartzite 13,85 



T;nreka .[uartzitr 13, 57 



Page. 



Tbickness of Hamburg limestone 13, 40 



shale 13. 41 



Lone Mountain limestone 13,58 



Lower Coal-measure limestone 13.85,161,170 



measures, Carbon Ridge 173 



Spring Hill 170 



Mountain shale 13.38 



Nevada limestone 13,64 



Olenellus shale 42,46 



Paleozoic rocks iu British America 2U8 



Pogonip limestone 13, 49 



west of Wood Cone 123 



White Pine 49 



Wood Cone 49 



Prospect Mountain limestone 13.38 



quartzite 13, 35 



Secret Cauyou shale 13,39 



Upper Coal-measures 13.93,164 



Moleen Peak 93 



Weber 4-nnglomeratP 13, 92 



Carbon Ridge 173 



White Pine shale 13, 154 



Timber growth, Eureka Mountains 4 



Timpahute Range 188 



Olenellus shale 46 



Tin on Prospect Ridge 313 



Titauite in granite 337,338 



Toraebohm, A. E., secondaa-y enlargement of quartz.. 347 



Trachyte, age of 276 



Trachyte in Great Basin, absence of 280 



Trenton at White Pine 191 



fauna 2*, 50, 57. 59, 183 



horizon *. 13G 



in Lone Mountain limestone 57 



Pahranagat Range 196 



TridjTnite in pyrosene-andesite 263. 360 



Tucubit Mountains 202. 203 



Turner, H. AV., andesite in California 261 



V. 



Unconformity between Carboniferous and Triassic 10 



in Silurian 202 



Up])er Coal-measures 164 



Upper and Lower Devonian, commingling of 148 



comparisons of. 73 



Upper Cual-measurt' fauna 94 



limestone, area of 164 



Upper Coal-measures, Moleen Peak, tbickness 93 



thickness 164 



Upper Helderberg fossils at Eureka , 71,132 



Upper Quaternary 32 



sub-aerial deposits 32 



Upper Silurian, distribution of 203, 206 



Uranium, Prospect Ridge 313 



V. 



Van Hise, C. R., secondary enlai'gement of quartz 347 



Variations from normal basalt 286 



rhyolite 286 



in lavas, 274 



Volcanic action, history of 268-273 



activity, duration of 232 



rocks, age of eruptions 231 



microscopical characters 348 



natural succession of 278 



relative age of 249 



