500 INDEX. 



Page. 



Eagle River, Triassic rocks of 122 



East River ■ 95 



Economical geology 175 



Electrical phenomena 466 



Elevations 429,492,494,495,496 



of j unctions of streams 433 



mountains 441 



parks,' valleys, &c 442 



passes and divides 443 



on White River plateau / 42 



revision of, in Elk Mountain 430 



Sawatch range 429 



Elk Mountain range 54, 64 



geology of 54, 58 



northwestern portion 59 



Mountains - 92,100,416 



elevations of , .. 430 



revision of elevations in 430 



Endlich, F. M., S. N. D 103,114,124,139,152 



letter to Dr. Hayden 183 



report of 181 



Engineer Mountain 207,217 



Erosion 161 



Eruptive rocks 163 



Excelsior lode 235 



F. 



Fault-fold of Elk range 68 



Florida, Rio 224 



Fort Benton group 135 



Pierre group 137 



Union group » 23, 141 



Fossil flora of Carboniferous 278 



Cretaceous 284 



Devonian 277 



Jurassic 283 



Triassic 283 



plants of Lignitic group . . „ 32 



Silurian group 276 



Fossils of Permo-Carboniferous 118 



Fox Hills group 35,45,137,139 



Fremont, Capt. J. C 415,416 



Front range 37, 45, 436 



Fruit on the Loess deposits 249- 



Frying Pan Creek 87 



Fuel from surface-deposits of Nebraska 262 



Gallisteo sand group 150 



Gannett, Henry, M. E., geographical report of ., 413 



Garden of the Gods , 43 



Gauging of streams 440 



Geographical report of Henry Gannett 413 



Geography 411 



of middle district, etc 416 



Geology of district drained by Rock Creek 63 



eastern base of Colorado range 40 



Pleasant Park 41 



Sopris Peak and vicinity 61 



Gilbert, G. K 162 



Gill, Theo., letter to A. C. Peale 153 



Glacial action 49,161,192 



Godwin Creek 204 



rate of fall of 447 



Gold 175 



Golden City 33 



Gothic Mountain 55,419 



Grand River 57,85,93,161,172,421,437 



