Sulphur, volcanic exhalations of.
Sumatra, promontories of.
Summary on the recent elevatory movements. --on the Pampean formation. --on the tertiary formations of Patagonia and Chile. --on the Chilean Cordillera. --on the cretaceo-oolitic formation. --on the subsidences of the Cordillera. --on the elevation of the Cordillera.
Tacna, elevation of.
Tampico, elevated shells near.
Tandil, crystalline rocks of.
Tapalguen, Pampean formation of. --crystalline rocks of.
Taylor, Mr., on copper veins of Cuba.
Temperature of Chile during the tertiary period.
Tension, lines of, origin of, axes of elevation and of cleavage.
Tenuy Point, singular section of.
Tenuyan, valley of.
Terraces of the valley of S. Cruz. --of equable heights throughout Patagonia. --of Patagonia, formation of. --of Chiloe. --at Conchalee. --of Coquimbo. --not horizontal at Coquimbo. --of Guasco. --of S. Lorenzo. --of gravel within the Cordillera.
Theories on the origin of the Pampean formation.
Tierra Amarilla.
Tierra del Fuego, form of sea-bottom. --tertiary formations of. --clay-slate formation of. --cretaceous formation of. --crystalline rocks of. --cleavage of clay-slate.
Tosca rock.
Trachyte of Chiloe. --of Port Desire. --in the Cordillera.
Traditions of promontories having been islands. --on changes of level near Lima.
Trees buried in plain of Iquique. --silicified, vertical, of the Uspallata range.
Tres Montes, elevation of. --volcanic rocks of.
Trigonocelia insolita.
Tristan Arroyo, elevated shells of.
Tschudi, Mr., on subsidence near Lima.
Tuff, calcareous, at Coquimbo. --on basin-plain near St. Jago. --structure of, in Pampas. --origin of, in Pampas. --pumiceous, of R. Negro. --Nuevo Gulf. --Port Desire. --S. Cruz. --Patagonia, summary on Chiloe. --formation of, in Portillo chain. --great deposit of, at Copiapo.
Tuffs, volcanic, metamorphic, of Uspallata. --of Coquimbo.
Ulloa, on rain in Peru. --on elevation near Lima.
Uruguay, Rio, elevation of country near.
Uspallata, plain of. --pass of. --range of. --concluding remarks on.
Valdivia, tertiary beds of. --mica-slate of.
Valley of S. Cruz, structure of. --Coquimbo. --Guasco, structure of. --Copiapo, structure of. --S. Cruz, tertiary formations of. --Coquimbo, geology of. --Guasco, secondary formations of. --Copiapo, secondary formations of. --Despoblado.
Valleys in the Cordillera bordered by gravel fringes. --formation of. --in the Cordillera.
Valparaiso, elevation of. --gneiss of.
Vein of quartz near Monte Video. --in mica-slate. --relations of, to cleavage. --in a trap dike. --of granite, quartzose. --remarkable, in gneiss, near Valparaiso.
Veins, relations of, to concretions. --metalliferous, of the Uspallata range. --metalliferous, discussion on.
Venezuela, gneissic rocks of.
Ventana, Sierra, Pampean formation near. --quartz-rock of.
Villa Vincencio Pass.
Volcan, Rio, mouth of. --fossils of.
Volcanoes of the Cordillera. --absent, except near bodies of water. --ancient submarine, in Cordillera. --action of, in relation to changes of level. --long action of, in the Cordillera.
Wafer on elevated shells.
Waves caused by earthquakes, power of, in transporting boulders. --power of, in throwing up shells.
Weaver, Mr., on elevated shells.
White, Martin., on sea-bottom.
Wood, silicified, of Entre Rios. --S. Cruz. --Chiloe. --Uspallata range. --Los Hornos. --Copiapo.
Yeso, Rio, and plain of.
Ypun Island, tertiary formation of.
Zeagonite