INDEX. 305 



Page. 



Rabbit Valley 27:{,27G 



Eeccncy of faults 42 



Eoccssion of cliffs 19 



Red Gate 278,281 



Rliyolite, olassiflcation of . 101, 10:i 



Occurrence in — 



Marliiigunt 61, 6G, 19:!, 197 



Sevier Valley CG,2i:{ 



Tnsliar 00,00,175,177,180 



Order of sequence 03, 07, 131-1:57 



Eichtbofen, classiiication of volcanic rocks 10:!, 105 



Order of sequence of eruptions 02 



Rivers, persistence of 16 



Roan Clifls 101 



Salina 170 



Salina Canon 103,256 



San Juau River 290 



San Rafael monocline 44 



San Rafael swell 19 



San Pete Plateau 165 



San Pete Valley 101 



Scrope, 6. P., lavas of tho Auvergnc 50,2:11 



Seleuite in Jurassic shales . . 154 



Sequence of eruptions - 62, 131-137 



Sevier fault :iO, 16;!, 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 



Shindrump, the 144 



Markilgunt 208 



Thousand Lake Mountain 281 



CirclcClitts 290 



Shore line of the Eocene Lake 44,184 



Sierra Abajo "0 



Sierra La Sal 289 



SiliciCed wood 147,207 



Silica, percentage of, in lava;) 88,117, 123 



Soda in volcanic rocks 89, 117, 123 



Stratigraphy of the High Plateaus (Chap. VI) 243 



Strawberry Valley 2.'>8 



Structural geology (Chap. II) '-5 



Sub-acid rocks. (/Sec Trachyte.) 

 Sub-basic rocks. ("See Andesitc.) 



Subsidence of Cretaceous- Eocene beds 13 



Suinujit Valley 259 



Table Cliff 253,291,257 



Tachylitc ^ 



Tantalus Creek 287 



TempleCreek 287 



Terrill, Mount 2.')9,267 



Tertiiiry foruiiiliouH '■'^ 



:iO u p 



