OCR Text |
Show index. 305 Page. Rabbit Valley......................... .................................................... 273,270 Recency of faults........................................................................... 42 Recession of cliffs........................................................................... 19 Red Gate.................................................................................... 278,281 Rkyolite, classification of................................................................... 101,10:5 Occurrence inâ€" Markagunt....................................................................61,63,193,197 Sevier Valley................................................. ..................... 66,213 Tushar....................................................................60,66,175,177,180 Order of sequence ................................................................63, 67,131-137 Richthof en, classification of volcanic rocks.................................................. 103,105 Order of sequence of eruptions.......................................................... 62 Rivers, persistence of................................................'....................... 16 Roan Cliffs................................................................................ 161 Salina..................................................................................... 170 Salina Canon............................................................................... 163,256 San Juan River............................................................................ 290 San Rafael monocline............................................. ......................... 44 San Rafael swell........................................................................... 19 San Pete Plateau........................................................................... 165 San Pete Valley........................................................................... 161 Scrope, Gr. P., lavas of the Auvergne.....................................................â€" 56,231 Sclenite in Jurassic shales................................................................. 154 Sequence of eruptions....................................................................62,131-137 Sevier fault.........................................................................30,163,225,238 Sevier Plateau, general account of (Chap. XI)................................................ 225 Relations to District of High Plateaus................................................... 3 Western front......................................................................... 171,226 Sevier River............................................................................... 212 Sevier Valley............................................................................... 3,211 Shinarump, the........................ ................ .................................. 144 Markagunt............................................................................ 208 Thousand Lake Mountain............................................................... 281 CircleCliffs......................................................................... 290 Shore line of the Eocene Lake........................................................... 44,184 Sierra Abajo........................................ ..................................... 50 Sierra La Sal............................................................................. 289 Silicified wood............................................................................ 147,207 Silica, percentage of, in lavas....................................................,.........88,11?, 123 Soda in volcanic rocks..................................................................89,117,123 Stratigraphy of the High Plateaus (Chap. VI)............................................. 243 Strawberry Valley......................................................................... 258 Structural geology (Chap. II) ............................................................ 25 Sub-acid rocks. (See Trachyte.) Sub-basic rocks. (See Andesito.) Subsidence of Cretaceous-Eoceue beds'....................................................... 13 Summit Valley.......................................................................... 259 Table Cliff....................................................................-.......253,291,257 Tachylito............................................................................... Ill Tantalus Creek.......................................................................... 287 Temple Creek.......................................................................... 287 Tamil, Mount.................... .........*r........................:..................... 259,267 Tertiary formations.................................................................... 158 20 ii P |