INDEX. 505 



Laramie Eancre (Black Hills') 112 



Peat..'. .' 17,113 



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



Lignite beds * ". 16,22,59,74 



Group, Great 93 



Lincoln, Nebraska 101 



Leidv's, Doctor, description of fossil mammals 105 



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 Siredona 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 58 



Plants, fossil 89,94,143,164 



Platte Eiver, area drained by 122 



Valley 102 



Point of Eochs 141,166 



Eawlings's Springs 135 



Eed Creek 65 



Canon 66 



Buttes 27 



Ee view,' 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 Bluif 110 



