8G8 



INDEX. 



Page. 



East Canon Creek, irid j-mite in trachyte 382 



Oquirih Monntaina 444 



Eastern ioot-hills of C oloeado E ange 26 



geological features 27 



gjpsnm in Xriassic 36, 46, 58 



Jurassic 28,38,58 



limestone in Triassic 35, 85 



Palaeozoic series 29 



sfction of Colorado Cretaceous.. 44 



thickness of Triassic 28 



Eabteen TJriJFT (Wahsatch Eange) , 406 



Eabt Humboldt Kakge 528 



Cave Spring 531 



garnet in quart zite 533 



geological structure 528 



glacial erosion 533,537 



limestone in ArchjBan 533,535 



Ogden Devonian 531 



quartz in trachyte 532 



qnartzite in Archaean 533 



trachyte 531 



thickness of Wahsatch lime- 

 stone 530, 538 



zircon in gneiss 533, 535 



East Mountain, Uinta Eange, Upper Coal-Meascres. 281, 283 



Eden Pass, Wahsatch Eange, line of fault 402 



Edward'sCreek Valley, altitude 649 



Egan Canon, arglUites in Cambrian 488 



granite 488 



mica-schist in Cambrian 488 



zircon in granite 488 



Egan Eanok 486 



Devonian limestone 488 



geological structure 486 



rbyolite 487 



Wahsatch limestone 487 



Egyptian and Osino CajIons 592 



caiioD,ande8ite 592 



basalt .*. 592 



Eldorado Cafion, West Humboldt Eange 727, 730 



Elk Gap, Little Snake Eiver 220 



Elkhead Mountains 167 



Basaltic Hills 176 



. general description 167 



theEampart 180 



Trachttic Eegion 1C9 



Vermillion Creek Eocene 187 



Elk Mountain, altitude , 94 



Carboniferous 149 



chlorite in gneiss 103 



Colorado Cretaceous 149 



Dakota Cretaceous 149 



described 102 



Port Benton group lEO 



Fox Hill Cretaceous 150 



gneiss 103 



Iron-ore 150 



Jurassic 149 



Eegion 148 



Triassic 149 



Elko and Eiver Eanges 593 



Valley, coal in Gfeen Eiver Eocene 595, 60 1 



Elk Eiver, Colorado Cretaceous 182 



Emigrant Canon, Tucubits Mountains 524 



road, Cortez Eange, rbyolite 589 



Page. 



Emigration Cafion, Wthsatch, synclinal in Jurassic. 371 



thickness of Ti iassic. 370 



Emma Hill, Little Cottonwood Canon, Wahsatch ... 364 



Emmons' Peak, Uinta Eange, altitude 195 



Eocene formations. Green Eiver Basin, thickness... 203 



Epbydra gracilis 4.36 



Epidote in Archaean 17,108,135,140 



in propylite 662 



Epipactis gigantea 747 



Equisetum Haydeni 146 



Erigenoc Canadensis 747 



Erosion, glacial 96,97,131, 



303, 310, 312, 349, 354, 356, 458, 533, J37, 620 



in Bnffolo Canon, West Humboldt Eange. . . 728 



Trucliee Caiion 829,837 



of Bridger Eocene 217 



Green Eiver Basin 206 



Humboldt Pliocene 583,819 



rhyolites 685 



Washakie Basin 210 



pre-glacial 636 



since basaltic period 576 



Escatakte Hills and Tampa Plateau Si82 



Estes Park, Colorado Eange, altitude 19 



Estimation of zirconia in gneiss by E. W. Wood- 

 ward 397 



Ethel Peak, Park Eange, altitude 130 



granite 135 



Euclid Peak, Fonntain Head Hills, Upper Coal- 

 Measure limestone 521 



EuGiNE Mountains 739 



Jurassic 740 



syenite 740 



Eureka Mining District, Pogonip limestone 547 



Wahsatch limestone 548 



Evans, Colorado, position 3 



Evanston, Laramie Cretaceous 330 



Eyrie Peak, Wahsatch Eange, described _ 416 



Fairbank's Point, Hava'lah Eange, rbyolite 685 



Farmington and Weber Eegion 374 



ARCH.ffiAN BODY 377 



garnetin 379 



zircon in 379 



Fault Cafion, Wahsatch Eange 395 



in Cambrian, Bonneville Peak 456, 459 



OphirCity 444 



Summit Valley, Uinta Eange 287 



Tertiary, Brown's Park 223 



Tucubits Mountains 524 



Wahsatch Eange 345, 346, 347, 352, 393, 402, 403 



Wahsatch Lmestone, Seetoya Mountains. . . 607 



line at Eden Pass, Wahsatch Mountains 432 



of Eed Creek Archaean 268,272 



opposite Island Park, Uinta Eange 286 



Fauna of Bridger Eocene 245 



Green Eiver Eocene 241 



Feldspar-porphyry, delessite.in 828 



Franklin Buttes 492 



Granite Mountain 691 



liquid-inclusions in feldspar of. 479 



in Jurassic slates 756 



Spruce Mountain 510,511 



Truckee Caiion t28 



Ferraginons clay s of Foit Benton group 87 



