506 INDEX. 



Page. 



Roads and trails 439 



Roaring Fork 56,68,86,88,422 



rate of fall of 433 



synclinal 59 



Robert Bruce lode ,... 234 



Roche Moutonne"e Creek 80,81,83 



Roches Moutonnees 161,192,220 



Rock Creek 59,61.63,65,69 



Rogers, Prof. H. D..... 281 



Roubideau's Creek 104 



Ruffuer, Lieut. E. H 98,99,416 



Ruins at Aztec Springs 377 



in Mancos Caiion 373 



on the Hovenweep 381 



McElrao 378 



Rhoda, Franklin, report of 451 



Rhyolite 197,204,206 



S. 



Salt Mountains 103 



San Cristoval Lake 203, 455 



San Juan City 199 



mines 229 



Mountains 452 



River , 369 



San Miguel Lake 228 



River 206,215,477 



rate of fall of 446 



section on 227 



Sand-hills of Nebraska 259 



Sawatch range 48,54 



revision of elevations of 429 



Scenery of Loess age in Nebraska 250 



Schimper, Professor. 279 



Sedimentary area of San Juan district 210 



Settlements 428 



Shumard, Ur. G. D 117 



Sierra La Plata 369 



La Sal 103 



San Juan 369 



Silurian age 110 



formation ..• 210 



fossil flora ■. 276 



strata in Eastern Colorado 41 



Elk Mountains 57,69 



of Eagle River , 113 



section of u 113 



tables of comparison of 112, 114 



Silver 175 



Silverton 465 



Slate River 94 



Smith's Fork of Gunnison River 94, 97 



Sneffels, Mount 205,479 



ascent of 479 



Snow Mass group 65, 68 



Mountain 55,66,418 



Sopris Peak 55,66,41 



geology of 61 



Special report on Mollusca 389 



Strata, sections of, 30, 31, 33, 34, 38, 102, 113, 115, 116, 118, 119, 122, 125, 126, 127, 130, 131, 



132, 133, 134, 136, 137, 138, 156, 169, 227 



Sultan Mountain 207,217 



Superficial deposits of Nebraska 243 



fuel from 262 



Swallow and Hawn on Permian strata 117 



T. 



Table of analyses of coal 177 



Bear River group 144 



Bitter Creek series ..'. 145 



