NDEX 



Absorption of water, i apacityofdiflferenl strata for.. 419-420 



Aoeratherium, figure of remains of 525 



Algonkian formations 10-13 



Alkire artesian well, Denver, description of — £42,459 160 



Allacodon, 6gurea of remains of 521 



Allen- Bond coal dibtrict, features of 350-351 



American House, Denver, description of artesian 



well at 134, 153 



Analyses, rocks. ... 55, 66, 67, 301, 306, 308, 314, 375-387, 388-390 



artesian water 181 u;:; 



Anderson artesian well, Denver, description of 432, 44H 



analyses of water from 461, 402 



Andesitic pebbles of conglomerates, character of 315-316 



Animas River beds, description of 217-219 



fossils of 218 



Apatosaurus, description of 489-492 



Arapahoe epoch, orographic movement al closeof. 



phenomena of 246 



Arapahoe formation, feataresof 31-32,148.151-155 



fossils of 78-79,154,208,215,217,218,221-244 



line between Laramie and 146,212 



lower division of 152-153 



upper division of 153-154 



age of 208 252 



stratigraphic Weak between Laramie and 212 



relation bet ween I tan er and 212-213, 245 



flora of 225 



\ ertebrate fossils of 227 



water-bearing strataof 407-408, 423 125 



Archeanof the n gion, < haracter of 84,105 



Arkansas River, course am i iry ot 3 



discharge of 415-416 



Arkina, Colo., stone quarries at 390 



Artesian water, analyses of 461-463 



extent of supply of 403 



essential conditions of supply of 405, 408-410 



strata bearing 106 408 



Artesian wells, detailed account of 401-465 



y ieid of 425, 427 



life of 428 129 



causes of decrease in flow of 429-430 



flats concerning I 10 165 



list of 432-147 



Atlantosaurus, description of 485-489 



ge (logic place and i haracter of beds containing 

 remains of 22,61,476 



A _'.. v, S., cited 



Angite, analysis of 301 



Augite-niica-syenite, description of 308-311 



analysis of - 310 



Augite-syenite, ocoorrences "i 290 



Page. 



Baker coal mine, description of 369-371 



Baker cross fault, description of I '•- 139 



Baptanodon, beds containing remains of 475 



desci Iption of 485 



Barkley artesian well, description of 434,451-152 



Basalt, dikes and sheets of 279-296 



petrography of 297 



occurrence and character ot 297-308 



Ralston dike 302-304 



Table Mountain i M 



analysts of 306,308 



Bear Creek. Denver bed- on and near. 190-192 



Beekwith, 11. (_'.. fossil plants collected by 468,486 



Beecher, C. E., fossils identified by 234 



Eellevue, Colo., stone quarries at 395 



Belt, Thomas, human remains found 264 



Benton formation, description of I 



fossilsof 66,78-79 



outcrops mar Golden, Colo 87 



Berthoud, E. L., cited 157,332 



i reek, Colorado, fossils from 243-244 



Black Butte, Wyoming, Ceratopsidffi from 237 



Boulder, Colo., structure of the region about L05 ill 



unconformities near 109 



fault near 114 



section near 142-143 



coal field of 339-371 



Boulder peaks, structure of •. 6 



Boulder Valley region, geology of 120-141 



folds of 122-128 



faults of 128-141 



Brick clays of the district . 274 



Brontops, restoration of 546 



Brontosanrus, description of 492-494 



restoration of 530 



Brontotherids, figures of remains of 546 



Brontotbei ium, beds containing remains of 479-480 



figures of remains of 522 



Brown artesian well, description of I 



Building stones, occurrenci ' of ... 392-401 



| In. t of 400-401 



Burnt Knoll section through 123 



C. 



Cache la Poudre River, discbarge of 414 



Cambrian and pre- Cambrian formations and topog- 

 raphy 10-15 



Camptosaurus, description of 502-503 



restoration of 534 



Canal fault, description of 141 



55 1 



