Index. 



647 



TUFFS 



Tuffs, volcanic, metamorphic of 



Uspallata, 521 

 — of Coquimbo, 544 

 Turner, Mr., on the separation of 



molten metals, 134 

 Tyerman and Bennett on marine 



remains at Huaheine, 32 



ULLOA, on rain in Peru, 268 

 — on elevation near Lima, 273 

 Uruguay, Eio, elevation of country 



near, 190 

 Uspallata, plain of, 286, 515 



— pass of, 502 



— range of, 516 



— - concluding remarks on, 531 



YALDIVIA, tertiary beds of, 397 

 — mica-slate of, 457 

 Valley of S. Cruz, structure of, 202 



— Coquimbo, 252 



— Guasco, structure of, 261 



— Copiapo, structure of, 263 



— S. Cruz, tertiary formations of, 

 378 



■ — Coquimbo, geology of, 541 



— Guasco, secondary formations 

 of, 550 



— Copiapo, secondary formations 

 of, 551 



— Despoblado, 564, 566, 570 

 Valleys, in St. Jago, 25 



— gorge-like at St. Helena, 103 



— in New South Wales, 151 



— in the Cordillera bordered by 

 gravel fringes, 290 



— formation of, 292 



— in the Cordillera, 483 

 Valparaiso, elevation of, 239 



— gneiss of, 459 



Van Diemen's Land, 154 

 Vein of quartz near Monte Video, 

 432 



— in mica-slate, 451 



— relations of, to cleavage, 463 



— in a trap dike, 443 



■ — of granite, quartzose, 454, 529 



— remarkable, in gneiss, near Val- 

 paraiso, 460 



WOOD 



Veins in trachyte, 51 



— of jasper, 52 



— relations of, to concretions, 395 



— metalliferous, of the Uspallata 

 range, 529 



— metalliferous, discussion on, 580 

 Venezuela, gneissic rocks of, 424 

 Ventana, Sierra, Pamjjean forma- 

 tion near, 318 



— quartz-rock of, 434 

 Venus (fossil), 172 

 Villa Vincencio Pass, 516 

 Vincent, Bory St., on bombs, 44 

 Volcan Bio, mouth of, 485 



— fossils of, 490 

 Volcanic bombs, 42 



— island in process of formation 

 in the Atlantic, 105 



— islands, their distribution, 140 

 Volcanos of the Cordillera, 38S, 



480, 591 



— absent, except near bodies of 

 water, 497 



— ancient submarine, in Cordil- 

 lera, 576 



— action of, in relation to changes 

 of level, 596 



— long action of, in the Cordillera, 

 601 



TT7ACKE, its passage into lava, 

 VV 31, 156 



Wackes, argillaceous, 5, 22 

 Wafer on elevated shells, 264 

 Waves caused by earthquakes, 

 power of, in transporting boul- 

 ders, 271, 301 



— power of, in throwing up shells, 

 244 



Weaver, Mr., on elevated shells, 



275 

 Webster, Dr., on a basin-formed 



island, 122 



— on gypsum at Ascension, 60 

 White, Martin, on soundings, 150 



— on sea-bottom, 225 



Wind, effects of, on the form of 



craters, 41 

 Wood buried at Iquique, 304 



— silicitied, of Entre Rios, 335 



