6.^2 



Index, 



CLAYSLATE 



Clavslate, feldspathic, of Chile, 

 471, 475, 482 



— feldspathic, of the Uspallata 

 range, 517, 520 



— black siliceous, band of, in por- 

 phvritic formations of Chile, 

 477 



Claystone-porphyry, formation of, 

 in Chile, 472 



— origin of, 477 



— eruptive sources of, 575 

 Cleavasre, of clavslate in Austra- 

 lia, 147 



— definition of, 424 



— at Bahia, 425 



— Eio de Janeiro, 245 



— Maldonado, 429 



— Monte Video, 433 



— S. Guitru-gueyu, 434 



— Falkland I., 440 



— T. del Fuego, 447 



— Chonos I., 459 



— Chiloe, 459 



— Concepcion, 458 



— Chile, 459 



— discussion on, 4G0 

 Cleavage-cross, in sandstone, 134 

 Cleavase-lamimesupernciallvbent, 



457 

 Cliff s, formation of, 228 

 Climate, late changes in, 303 



— of Chile during tertiary period, 

 112 



Coal, of Concepcion, 398 



— S. Lorenzo. 579 

 Coast-denudation of St. Helena, 



104 

 Cobija, elevation of, 264 

 Coehtteopa (fossil), 174 

 Cochlogena auris vuljrina, 101, 



171 

 Colombia, cretaceous formation of , 



578 

 Colonia del Sacramiento, elevation 



of, 190 



— Pampean formation near, 338 

 Colorado. Eio. gravel of. 219 



— sand-dunes of, 195, 216 



— Pampean formation near, 321 

 Columnar basalt, 13 

 Combarbala, 535, 538 



CORDILLERA 



Comptes Eendus, account of vol- 

 canic phenomena in the Atlan- 

 tic, 105 



Concepcion, earthquake of, 145 



— elevation of, 236 



— deposits of, 398, 407 



— crystalline rocks of, 457 

 Conchalee, gravel-terraces of, 217 

 Concretions in tuff, 54 



— in aqueous and igneous rocks 

 compared, 69 



— of obsidian, 69, 73 



— of gypsum, at Iquique, 303 



— in sandstone at S. Cruz, 378 



— in tufaceous tuff of Chiloe, 

 378 



— in gneiss, 423 



— in claystone-porphyry at Pert 

 Desire/437 



— in gneiss at Valparaiso, 

 460 



— in metamorphic rocks, 462 



— of anhydrite, 486 



— relations of, to veins, 526 

 Conglomerate, recent, at St. Jago, 



26 



— clavstone of Chile, 472, 477 



— of tenuyan, 492, 499, 533 



— of the Cumbre Pass, 506, 513 



— of Eio Claro. 545 



— of Copiapo, 564, 567 



Cook, Capt., on form of sea-bottom, 



227 

 Copiapo, elevation of, 263 



— tertiary formations of, 405 



— secondary formations of, 553 

 Copper, sulphate of, 553 



— native, at Arqueros, 541 



— mines of, at Panuncillo, 538 



— veins, distribution of, 580 

 Coquimbo, curious rock of, 162 



— elevation and terraces of, 248 



— tertiary formations of, 402 



— secondary formations of, 540 

 Corallines living on pebbles, 



226 

 Corals, fossil, from Van Diemen's 



Land, 155, 178 

 Cordillera, valleys bordered by 



gravel fringes, 289 



— basil, strata of, 472 



