300 DTOEX. 



Page. 

 Basalt — Continued. 



Occurring in the — 



Aquarius Plateau S95 



Archiean - 93 



Awapa Plateau 276 



Carboniferous 93 



Dog Valley 190 



Grass Valley 250 



Markagunt Plateau 197,199,200,202 



Paunsagunt Plateau 256 



Permian -. 93 



Silurian '. 93 



Triassic 93 



Tushar 177,180,183 



Basaltic cones 62, 198, 256 



Basic rocks. (See Basalt.) 



Basin Province, its topography 6 



Mountain ranges . 47 



Structural features 51 



Bear Peak 192 



Bear Valley 191 



Belknap, Mount 172 



Bitter Creek beds (see Eocene) : 12, 73, 158, 159, 195, 2"8 



Blue Mountain 228,232 



Bonneville Lake 41,211 



Book Cliffs 161 



Bullion Canon 174 



Canons , 8,252,286,290 



Carbonaceous shales 10, 156 



Carboniferous strata 143, 184 



Centers of erosion 18, 297 



Circle Cliffs 289 



Circle Valley 213 



Chalcedony 205,238 



Chemical characters of volcanic rocks 88, 117, 123 



Classification of volcanic rocks (Chap. IV) 82 



Coal 155,156 



Cones, basaltic 62,198,256 



Colorado River 8,15,278,287,289 



Cotta, B. von, Pro-Tertiary eruptions 96 



Conglomerates, general discussion of the formation of 214 



Conglomerate, Shinarump 147 



Conglomerates, volcanic 39,70,75,178,214,237,238,275,295 



Crotacoous, the — 



Brackish water beds of 10 



Carbonaceous shales — 10 



Condition of Plateau Country during 9 



Correlations of 9 



Extent of. in the Vest 9 



Island 295 



Of the— 



Aquarius Plateau 288 



Kaiparowits Plateau 291 



Markagunt Plateau 206 



