INDEX. 



877 



Page. 



Laramie Cretaceons, TamFa Valley 278 



Hills, altitude 4 



diallage in gabbro 13 



drainage of 5 



epidote in Archaean 17 



Pox Hill Cretaceous 49,59 



garnet in Arcbaean : 18 



geological btrncture of 6 



grapbite iu Arcbasan Ifi 



gypsum in Triaseic 79, SO 



hoi nblende gneiss 11 



ilmenite in gabbro 14 



Laurentian rocks of 7 



magnetite in 17, 18 



physical description of 4 



pyrites in Archaean 16 



Table ilonntain 50 



thickness of Palaeozoic on west side. 76 



Plains, altitude 73 



coal in Pox Hill Cretaceous 85 



Colorado Cretaceous 61, 82 



Cooper Creek, valley of erosion ... 65 



Dakota Cretaceous 78 



drainage of 74 



erosion of Triassic 77,99 



Jurassic limestone 78 



lakes on 74 



Palaeozoic strata ^ 75, 82 



Quaternary 93 



section of Jurassic and Triassic... 80 



Tertiary 93 



thickness of Triassic 79 



Triassic 77,79,62 



Eiver, course of 74 



Port Benton group 84 



source of 85 



Valley, glacial erosion in 96 



Jurassic 61 



Triassic 81 



Last Chance Spring 480 



Laurentian of the Laramie Hills 7 



Wahsatch Kange 377 



Leaves in Fort Benton sandstone 89 



Leech Spring, Antelope Hills, tridymite in rhyolite... 485 



Leidy's Peak, Uinta Bange, Weber Quartzite 260 



Lepidodendron 34:',547 



Lepidolite in granite 777 



Lepidomelane in granite 10, 12 



Leucite Hills, Wyoming, described 236 



Lewiston, Oquirrh Mountains, Wahsatch limestone. 447 



Life in Niobrara Pliocene 71 



SaltLake 435 



Soda Lakes, Carson Desert 749 



Lightning (effects of), Hantz Peak 174 



Lily's Canon, tTpper Coal^Measures 280 



Park, Jurassic 281 



Triassic 281,283 



'Limestone (bituminous), in Colorado Cretaceous . .. 121 



in ArchKian 107,425,533,535 



Niohrara Pliocene 69 



EedBeds 163 



Limit of forest growth, Colorado Kange 21 



Medicine Bow Kange 97 



Park Range 132 



Uinta Kange 195 



Page- 

 Limit of Uinta Tertiary, Wonsits Ridge 294 



Lion Hill, Oquirih Mountains, Wahsatch lime- 

 stone 447 



Liquid carbonic acid in quartz, Davis Peak 138 



quartzite, Jack's C reek 139 



inclusions in feldspar of porphyry 479 



quartz of rhyolite 174, 482, 486 



Lilhophysas in rhyolite 519, C 15 



Little Cedau Mountaiks 512 



Thermal springs 514 



Cottonwood Cafion, grani te 355 



Ogden Qu artzite 363 



Ute limestone 363 



Wahsatch limestone 362 



Waverly limestone 365 



Laramie Basin, Fort Pierre clays 83 



Muddy Creek (east), Laramie Cretaceous... 153 

 (west), Vermillion Creek Eo- 

 cene 209 



Snake River, gneiss 139,175 



Laramie C retaceous 167 



Long's Peak, Colorado Range, altitude 19 



granite 22 



phosphoric acid in 



granite 23 



position 18 



tremolite in granite .. 23 



Lodore Canon, Uinta Range, depth 196, 287 



L ogan Canon, Wahsatch Range, synclinal r 406 



Peak, Wahsatch Range, described 407 



Lone Peak, Wahsatch Range, altitude 353 



Arcbaean... 358 



granite 357 



Lookout Mountain, Gosi-Ute Range, altitude 504 



Louis Valley, rhyolite 848 



Lovelock's Knob, granite 754,700 



rhyclite 760 



Station, Truckee Miocene 732 



Lower Coal-Measures, Black Rock Point 453 



Dixie Valley 562 



Eureka Mining District 548 



Lookout Mountain 504 



Spruce Mountain 510 



Stansbury Island 4C0 



Strong'sKnob 654 



Tooelle Cafion 450 



Helderberg, P.non Range 557 



White's Ranche, Boulder Creek 603 



Liassic, New Pass Mountains 646 



Quaternary, Carson Desert 744 



TkUCKEE VALLEr 817 



Luxor Peak, Truckee Range, Truckee Miocene 808 



Madelin Mesa described 799 



Maggie's Peak, Seetoya Mountains, gi anite 606 



Magnetic attraction of basalt, Anita Peak 179 



Magnetite in Archaean 17,18,26, 108,136,140 



123 

 487 

 731 

 590 

 590 

 289 

 427 

 695 



trachyte 



Mahogany Peak, Wahsatch limestone 



Malachite 



MALLA1.D Hills 



rhyolite 



Marsh's Peak, region east of 



Matlin Station, terrace lines 



McKinney's Pass, rhyolite following fault-line . 



