INDEX. 



873 



FoBsils, TTintacf inuB socialis 



Uiutatberinm robustum 



Uintornis lucai is 



TJuio , 



Unio belliplicatus , 



TJnio Haydeni 



Tlnio tellinoides 



XTnio vetustus , 



296 



249 

 249 

 .212,214,242 

 328 

 248 

 215 

 328 



Viviparus 147,209,212,242 



Viviparus Cooradi 328 



Viviparus paludiiiBe-formis 248 



Viviparus Wyomingensis 248 



Volsella 263 



Volsella scalprum var. isonema 390 



:, Zaphientis . .282, 313, 3C8, 384, 401, 404, 409, 446, 547, 558 



Zaphrentia centralis 353,304 



Zaphientis exceutrica 404 



Zaphrentis multilamella 458, 460, 465 



Zapbrentis Stausburyi. . .289, 385, 404, 423, 460, 465, 600 



Fossil Hill, Kaweoh Mountains, Truckee Miocene . . . 766 



in Weber Quartzite 290 



Pass, I'iiiou Kange, basalt 560 



FousTAix Head Hills 520 



Weber Quartzite 521 



FoxHili Cretaceous, Ashley Creek 295 



Bear Ridge, Yampa Valley 185 



Bear River City 327 



. • Big Horn Ridge ..;..„ 265 



bluff structure 152 



Bridger's Pass 157 



characterized 59, 229, 233, 252 



sulphur in coal of 86 



Colorado 59 



eastern foothills, Colorado 



Range 28,60 



Elk Mountain 150 



Barn's Hill, Green River Basin 251 



Laramie Hills -_ 49,59 



Medicine Bow Range, east 



base 84,85,86 



Medicine Bow Valley 143 



Mount Steele Ridge 153 



North Platte 154 



Oyster Ridge, Green River 



Basin 251 



Eawlings Peak 164 



thickness of 28, 60, 143, 154, 157, 201 



TJinta Range 201 



Vermillion Creek Valley 276 



WoDsits Ridge, bituminous 



sandstone in 295 



Yampa Valley 278 



Fbasklin Buttes ^ 491 



diabase 493 



feldspar-porphyry 492 



granite-porphyry 491 



French Canon, Montezuma Range, rhyolite 757 



Creek, Medicine Bow Range, diorite 100 



glacial erosion. 97 



gneiss 101 



mica-schists... 105 



Fremont's Island, Salt Lake, Arch oean 425 



Pass, East Humboldt Range, granite 532 



From Aspen to Echo City 3=26 



Frontispiece. Eocene Badlands, Washatio Basin, 



described 217 



Page. 



Front Range, Wahsatoh 393 



Fucoids in Cretaceous 332 



Gabbro, ilmenite in J4 



Laramie Hills 13 



Galena 731 



Garden-Gate, Wah.weah Range 566 



Valley, basalt 501 



Garnets in Archaean 1 8, 28, 101, 



108, 109, 138, 140, 270, 360, 379, 691 



granite 777 



quartzite 533 



rhyolite 561 



trachyte 598 



Gay-Lussite in Pliocene, Pine Valley 583 



Soda Lakes, Carson Desert 749 



General Geology of the Laramie Plains 75 



Uinta Uplift 198 



Generalized section of the sedimentary rocks of the 



Fortieth Parallel 854 



Geodo CaBion, Uinta Range, Upper Coal-Measures. .. 291 



Goograph cal distribution of Coal-Measure fossils 670 



Geological description of Park Range 132 



structure of the Wahsatch Range ...341, 393, 406 



Geology of Colorado Range 21 



Medicine Bow Range 97 



Gilbert's Peak, altitude 195 



Weber Quartzite 258 



Glacial action on quartzite 97 



erosion, Cottonwood Cafions.Wahsatch Range 354, 356 



Duchesne Fork, Uinta Range 312 



East branch of Duchesne Fork 303,310 



East Humboldt Range 533,537 



French Creek, Medicine Bow Range. 97 



Laramie Valley 96 



Park Range 131 



Shoshone Peak 620 



Timpanogos Peak, Wahsatch Range. 349 

 AVillow Creek Calion, Aqui Mount- 

 ains 458 



moraines, Uinta Range 257, 300, 310 



period in Green River Basin 206 



Gneiss, Clark's Peak, Medicine Bow Range 98 



Davis Peak, Park Range 138 



Deer Mountain, Medicine Bow Range 101 



Elk Mountain, Medicine Bow Range 103 



French Creek, Medicine Bow Range 101 



(hornblendic), Medicine Bow Range 99 



Lake Range 814 



Little Snake River 139, 175 



Mount Bonpland, structure of 536 



Ogden CaDoji, Wahsatch Range 398 



Sheep Mountain, Medicine Bow Range 108 



Signal Peak, Colorado Range 11 



titanitein 101,102 



West Humboldt Range 715 



Gothitein basalt 178 



Golconda Pass, Havallah Range, basalt 686 



rhyolite 686 



Truckee Miocene . . 686 



Gold in Archajan, Medicine Bow Range 109 



Park Range 140, 181 



Triassic, Dun Glen, Pah-Ute Range 712 



Weber Quartzite, Oquirrh Mountains 452 



Goose Creek Hills 515 



granite-porphyry 515 



