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Show 306 INDEX. Page. Tertiary formationsâ€"Continued. Of theâ€" Aquarius........................................................................288,290,292 Awapa.......................................................-.............-....... 273 Markagunt......................................................................189,191,204 Moraine Valley...................,................................................. 270 Pavant........................................................................... 170 Eabbit Valley...................................................................... 273 Summit Valley..................................... ...........................259,267,269 Table Cliff......................................................................... 253,297 Thousand Lake Mountain .......................................................... 280 Tushar.............................................................................- 184 Wasatch Plateau.................................................................... 166 Unconformity with Cretaceous .................................................11,158,280,288,290 Texture of porphyry........................................................................ 97 Tufaceous beds......................................................................... 74 Volcanic rocks......................................................................... 88,91 Thousand Lake fault.............................................................33,277,279,291,297 Thousand Lake Mountain.................................................................. 280 Traehy-dolerite........................................................................... 65 Trachyte, age of eruptions of................................................................ 59,180 Argilloid.........,..........'.„............104,198,229, 239,241,242,261,265,288,269,270,272,274 Augitic.....................................................104,196,197,233,240,261,265,268,272 Classification of........................................................................ 101,104 Granitoid..................................................104,190,229,239,241,261,265,268,274 Hornblendic................................................190,229,240,242,258,280,265,272,295 Hyaline................................................................................ 104 Order of sequence...............................................................___. 67,131-137 Porph vritic............................................................................ 104 Sanidin............................................................................... 101,268 Occurring inâ€" Aquarius Plateau............................................................... 293,295 Awapa......................................................................... 274 Dog Valley____................................................................ 190,212 Fish Lake Plateau.............................................................. 257,265 Hilgard, Mount................................................................. 271 Markagunt Plateau................................. ........................,..... 196,199 Marviuc, Mount................................................................ 269 Sevier Plateau.......................................................59,229,239,241,242 Sevier Valley................................................................... 212 "Terrill, Mount............................................... .................. 288 Tushar.....................................................................177,180,181 Trachytic obsidian....................... ................................................. 107,274 Trachitic centers of eruption.......... .................................................... 59 Triassic (Upper)............................................................................. 20,147 Circle Cliffs............................................................................ 289 Escalante Basin......................................................................... 290 Markagunt............................................................................. 207 San Eafael swell....................................................................... 20 Thousand Lake Mountain.............................................................. 281 Water-Pocket fold..................................................................... 287 Trumbull, Mount.............'............................................................... 252 Tufas..........................................................................57,69,71,192,243,249 Tushar Range, general discussion of (Chap. VLII) ........................................... 169 Relations to District of High Plateaus................................................... 3 |