886 



INDEX. 



Page. 



Tbickoess of "W"., Dming Conglomerate 72, 157, 246, 247 



Thousand Spring Valle.y, described 519 



limpacogos Peak, glacier basin 349 



structure 345,349 



Tirakav Plateau, Wyoming Conglomerate 290,294 



Titanite in diorite 622,639 



granite . . 356, 357, 359, 360, 477, 576, 676, 738, 778, 607 



granite-porphyry 449, 485, 491 



gneiss 101,102 



trachyte 



TOAKO GROUP 



geological structure 



Tokewanna Peak, altitude of 



Weber Quartzite 



T00EL1.B A^ D KUSH VALLEYS 



CaSion, Lower Coal-Measure limestone. 



170 

 517 

 517 

 195 

 25C 

 454 

 450 



Tourmaline in granite 270,691,777 



ToYABE Range 627 



granite 628 



Truckee Miocene 631 



Trachyte, Anabo Island, Pyramid Lake 824 



Astor J'ass, Virginia Eange 848 



(augite), Korth Park 124 



Pilot Butte 233 



Berkshire Canon, Virginia Eange 841 



UODY OF WESTEUN UlKTA EaNGB 316 



breaking through rhyolite 835 



Camel Peak, Elkhead Mountains 172 



City C reek, Wahsatch Eange 375 



Coal Creek, Seetoya Mountains 605 



Crescent Peak, Elkhead Mountains 171 



divide between Prove and Silver Creeks.. 319 



Dixie Valley 559 



East Canon Creek 381 



East Humboldt Eango 531 



Elkhead Mountains 169, 176 



Euclid Peak, Tonntain Head Hills 522 



Hantz Peak, Elkhead Mountains 173 



Haiiyne in 568, 593 



559 

 642 

 772 

 384 

 700 

 381 



. hoiublende prevaiting over sanidin. 



Jacob's Promontory 



Kawsoh Mountaics 



Kimball's, Parley's Park 



like rhyolite 



Morgan Valley 



Palisade Caflou, Cortez Eange 585, 587 



Parkview Peak, North Park 122 



Pine Nut Cauou, Pah-Ute Eange 700 



Purple Hills, Virginia Eange . . .i 833 



(quartz) , Cave Creek, East Humboldt Eange 532 



Havallah Eange 684 



Steves Eidge, Elkhead Mountains 170 



Wah-weah Eange 568 



White Eocks 463 



Eoberts' Peak 565 



Sheep Corral Caiion, Virginia Eange 832, 837 



Skelligs Eidge, columnar structure of 171 



Spanish Peak, Virginia Eange 831 



Sugar Loaf, Elkhead Mountains 170 



texture of andetite ' 827 



titanite in 170 



Traverse Mountains 440 



tridymite in 317, 320, 382, 384, 375, 598 



Truckee Canon, Virginia Eange 827, 828, 



830, 831, 834 

 Wagon Canon, Cortez Eange 580 



Trachyte, Wah-weah Eange 



Whitehead Peak, Elkhead Mountains 



Willow Creek Caiion, Piiion Eange 



Transition from garnet to chlorite 



Traverse Mountains 



andesite 



trachyte 



Tremolite in granite, Long's Peak 



Triassic, Antero Caiion, Uinta Eange 



Ashley Creek, Uinta Eange, section of 



Black's Fork 



eastern foothills, Colorado Eange 



Elk Mountain, Wyoming 



Flaming Gorge Eidge, thickness of 



Formation of the Colorado Eange 



Inskip Caiion, Pah-Ute Eange 



Lake Fork, Uinta Eange 



Laiamie Plains 



erosion of 



thickness of 



Valley 



Lily's Park 



limestone in, Colorado Eange 



Koipato 644, 708, 716, 718, 719, 



Miner's Canon, Truckee Eange 



near Hantz Peak 



North Park, thickness of '... 



Eawlings Peak , Wyoming 159, 



Eipplemarks in 



Stanton Creek, Uinta Eange...- 



Star Peak 651, 657, 682, C93, 718, 



Uinta Eange, described 



thickness of 



Upper Yampa Eiver 



Valley of Burnt Fork 



Tampa Valley 



Tridymite in rhyolite 430,485, 



trachyte 317, 320, 375, 382, 



Trinity Canon, Montezuma Eange, ArchiEn schists . 



Peak, Montezuma Eange, altitude of 



Trona, an article of commerce 



TaucKEE Canon .- 



andesite 



angi te-andesite 



basalt 828, 



columnar structure in rhyolite 



diorite 



feldspar-porphyry 



Humboldt Pliocene 



propylite 



rhyolite 



trachyte 827,8-28,830, 



Miocene — Carson Desert 



Dog Creek, coal 



Golconda Pass 



gypsum in 



Humboldt Valley 



infusorial silica 



Job's Creek 



Kamma Mountains 



Kawsoh Mountains 



Lone Hill Valley, coal in... 

 Lovelock's Station (east of) 



Luxor Peak (base) 



palagoaite tufa in 



qnartzite in 



Page. 



567 

 169 

 458 

 379 

 439 

 440 

 440 



23 

 S99 

 292 

 254 



28 

 149 

 265 



33 



709 



302 



77, 82 



77,99 



79 



81 



281, 283 



35,58 



7-28, 733 



809 



174 



115 



1C2, 163 



92 

 313 

 723, 732 

 200 

 200 

 184 

 859 

 •234 



516. 830 

 384, 598 



754 

 751 

 748 

 827 

 827 

 830 

 831, 836 

 830 

 832 

 828 

 831 



827. 831 

 831, 834 

 831, 834 



745 

 849 

 686 

 808 

 740, 742 

 770, 820 

 641 

 790 

 766 

 £59 

 732 

 808 

 768 

 771 



