Index. 



645 



SILICEOUS 



Siliceous sinter^ 52 



Silver mines of Arqueros, 540 



of Chanuncillo, 561 



of Iquique, 577 



— distribution of, 582 

 Slip, great, at S. Cruz, 379 

 Smith, Dr. A., on junction of gran- 

 ite and clayslate, 167 



Smith, Mr., of Jordan Hill, on up- 

 raised shells retaining their 

 colours, 209 



— on Madeira, 231 



— on elevated seaweed, 268 



— on inclined gravel beds, 515 

 Soda, nitrate of, 305 



— sulphate of, near Bahia Blanca, 

 307, 310 



— carbonate of, 308 

 Soundings off Patagonia, 215, 225 



— in T. del Fuego, 227 



Sowerby, Mr. G. B., his descrip- 

 tions of fossil shells (in Appen- 

 dix), 171 



— on fossil shells from St. Jago, 6 



— on land shells from St. Helena, 

 101 



— from Van Diemen's Land, 155 

 Spallanzani, on decomposed tra- 

 chyte, 29 



Specific gravity of recent calca- 

 reous rocks and of limestone, 

 57 



— of lavas, 135 

 Sphamdites in obsidian, 67, 76 



— in glass and in silicified wood, 

 71 



Sjririfera, 176 



Spirifers, 548, 551 



Spix and Martius on Brazil, 427 



Sprengel on the production of 



carbonate of soda, 274 

 Springs, mineral, in the Cumbre 



Pass, 505 

 Stenojjora (fossil), 178 

 Stokes, Mr., his collection of 



Sphaerulites and of obsidians, 



71,79 

 Stonv-top, Little, 89, 97 



— Great, 91 



Stratification of sandstone in New 

 South Wales, 149, 154 



SUMMARY 



Stratification in metamorphic 

 rocks, 424 



— of clayslate in T. del Fuego, 445 



— of the Cordillera of Central 

 Chile, 472, 482, 504 



— little disturbed in Cumbre Pass, 

 503, 512 



— disturbance of, near Copiapo, 

 574 



Streams of obsidian, 73 



— of lava at S. Cruz, inclination 

 of, 384 



— in the Portillo range, 497 

 String of cotton with fossil shells, 



268 



Struthiolaria omata, 387 



Studer, M., on metamorphic rocks, 

 464 



Stutchbury, Mr., on marine re- 

 mains at Otaheite, 32 



Subsided space at Ascension, 46 



Subsidence during formation of 

 sea-cliffs, 228 



— near Lima, 272 



— probable, during Pampean for- 

 maticn, 357 



— necessary for the accumulation 

 of permanent deposits, 417 



— during the tertiary formations 

 of Chile and Patagonia, 421 



— probable during the Neocomian 

 formation of the Portillo Pass, 

 491 



— probable during the formation 

 of conglomerate of Tenuyan, 501 



— during the Neocomian forma- 

 tion of the Cumbre Pass, 512 



— of the Uspallata range, 528, 533 



— great, at Copiapo, 565 



— great, during the formation of 

 the Cordillera, 588 



Sulphur, volcanic exhalations of, 



587 

 Sumatra, promontories of, 235 

 Summary on the recent elevatory 



movements, 218, 275, 598 



— on the Pampean formation, 349, 

 598 



— on the tertiary formations of 

 Patagonia and Chile, 386, 406.595 



— on the Chilian Cordillera, 585 



