416 



Page. 



Opal in andesite 234 



Oquirrh RaDge, Olenelliis shale 46, 186 



Ore, age of 300,316 



bodle.-), age of 293 



Deposits 292-310 



Ruby Hill 301, 306, 3ll 



in Carboniferous, absence of 298 



Eureka Tunnel 1 05 



on Hoosac Mountain 113 



Ores deposited as sulphides 310 



earlier than basalt 293 



later than rhvoM te 293 



of Prospect Kidge 300 



theCambrian 294 



Devonian 297 



Silurian 296 



Origin of lavas 272 



Orographic blocks 10,19 



P. 



Packer Basin 131 



Pahranagat Kange 196-200 



Paleontological classification 182 



Paleozoic ocean, western limit of 175 



Eocks, Discussion of 175-217 



in British America, thickness 208 



Great Basin 2U8 



section, Eureka 11-13 



thickness. Cambrian 13 



Carboniferous ... 13 



Devonian 13 



Silurian 13 



shore-line 175, 177 



Pancake Ridge, coal seams 95 



Partial magmas 287 



Peaks and Mountains — 



Alpha Peak 159 



Anchor Peak 146 



Argyle Mountain 193 



Atrypa Peak 65,76,76,125 



Basalt Peak 25 



Bellevue Peak 23, 119. 120 



Combs Peak 65. 75, 76, 78, 135 



Devon Peak 138 



Diamond Peak 155. 157 



Dome Mountain 147, 174, 244 



English Mountaii'. 149 



Fusilina Peak 159, 161 



Gray Fox Peak 110. 238 



Grays Peak 133 



Hoosac Mountain 112 



Island Mountain 80, 151 



Leader Mountain 151 



Lone Mountain 60 



Lookout Mountain 22. 129 



Modoc Peak 65. 75, 141, 142 



MoleeuPeak 181 



Newark Mountain 65, 155 



Pinnacle Peak 126, 129 



Pinto Peak 238 



Purple Mountain 238 



Quartz Peak 199,204 



Ravens Nest 200,203 



Eonndtop Mountain Ill 



Sentinel Peak 69 



Pejiks and Monntains — Continued. Page. 



Signal Peak 141,144 



Silver Peak 189 



Spanish Mountain 140 



Strahlenberg 25, 162, 386 ■ 



Sugar Loaf 69,79,83,151 



Surprise Peak 108,131 



Table ^iountain 138 



Tempi. Peak 137 



•White 1 l.rad Peak 119 



White Mountain 126 



Woodpeckers Peak 65, 73, 78 



Penfield, S. L., analysis of basalt 282 



Phillips, J. A., secondary enlargement of quartz 347 



Phosphoric acid in Cambrian limestone 38 



Physical classification of formations 184 



Piodmiintite in basalt 393 



Pinnacle Peak fault 126.129 



Piuon Range 200,323 



section across 201 



The Gate 83,144 



Pinto Basin, basalt 386 



fault displacement 18 



PeakrhyoUte 238,374 



Piute Range 9 



Plant remains in Carboniferous 87, 167 



Gre.atBasin 180 



Hayes Canyon 82 



White Pine shale 69 



Pliocene age of lavas 289 



ores 316 



Pogonip fauna 49 



CaiibouHUl 53 



Fish Creek Mountains 53 



Graptolites in 54 



Lone Mountain 60 



Surprise Peak 53 



White Mountain 52,127 



limestone, description 48 



Pahranagjit Range 197 



west of Wood Cone, thickness 123 



White Pine 48, 191 



White Pine, thickness 49 



Wood Cone, thickness 49 



Potsdam fauna 43, 46, 49, 183 



Pre-Canibrian barrier in East Humboldt Range 176 



Pre-Tertiary erosion 232 



Igneous Rocks 218-229 



Price, Thomas, analyses of limestones 37 



Prop.vlite, age of 276 



in Great Basin, absence of 279 



Prospect Mountain limestone, brecciaa in 36 



description 36 



dolomite in 36 



horizons of fossils 41 



marble in 36 



Olenellus shale 42 



Sierra TaUey 129 



stratification in 36 



thickuesB 38 



quartzite, absence of fossils 35. 41 



anticline 21 



description 35 



thickness 35 



tunnel 105 



fissures in 106 



Peak, altitude 4 



