INDEX. 505 



Page. 



Laramie, Eauge (Black Hills) 112 



Peak .- 17,113 



Letter to the Secretary of the Interior by Prof. F. V. Hayden 3 



Liguite beds 16,22,59,74 



Group, Great 93 



Lincoln, Nebraska 101 



Leidy's, Doctor, description of fossil mammals \05 



Lodge Pole Creek 11,111 



Logan's Peak _ 53 



Lone Star Lode 68 



Long's Peak 118 



Loup Fork .• 103 



Mammals, fossil 104, 145 



Marsh's, Prof., description of Siredons 131 



Mauvaises Terres 104 



Medicine Bow Butte 153 



Eiver 121 



Mineral Springs 152 



Miner's Delight (lode) 36, 178 



Glory (lode) 68 



Mines, observations on, Chap. XIV 177 



Missouri Valley, geology of 85 



general view of the geology of, Chap. VII 85 



Monument Creek Group 161 



Morgan City 158 



Muddy Creek. ... 26,48 



Needles, the 153 



Newberry, Dr. — extract from report on fossil plants 89, 94, 143 



Niobrara Eiver 104 



North Park 123 



Oil Springs of Bear Eiver 152 



Omaha City 98 



to Cheyenne, Chapter VIII 98 



Oyster Eidge 149 



Pacific Springs 39 



Pass Creek 76, 137 



Petrified fish bed... 143 



Petroleum coal 144 



Piny Butte 28 



Photograph Eidge i 58 



Plants, fossil '. 89,94,143,164 



Platte Eiver, area drained by 122 



Valley 102 



Point of Eocks 141,166 



Eawlings's Springs 135 



Eed Creek 65 



Canon 66 



Buttes 27 



Eeview, general, of geology from Omaha to Salt Lake, Chap. XIII. .. - . - 161 



Eidges of upheaval, Big Thompson Creek (cut) 162 



Jefferson Fork (cut) 163 



Eock Creek 79,122 



Eocky Mountains, over the first range of, Chap. IX 112 



Eound Table, The 15 



Sage Creek 76 



Salt Lake, Great, and bordering Plains 172 



Group 169 



Valley 160 



Springs 101 



Wells Station 71,141 



Sand Hills 103,109 



Sandy, Big and Little 40 



Scott's Bluff 110 



