x Contents, 



PART II. 

 CHAPTER VIII. 



ON THE ELEVATION OF THE EASTERN COAST OF SOUTH AMERICA. 



Upraised Shells of La Plata — Bahia Blanca, Sand-dunes and 

 Pumice-pebbles — Step-formed Plains of Patagonia, with npraised 

 shells — Terrace-bounded Valley of Santa Cruz, formerly a Sea- 

 strait — Upraised shells of Tierra del Fuego — Length and breadth 

 of the elevated area — Equability of the movements, as shown by 

 the similar heights of the plains — Slowness of the elevatory pro- 

 cess — Mode of formation of the step-formed plains — Summary — 

 Great" Shingle Formation of Patagonia; its extent, origin, and 

 distribution — Formation of sea-cliffs . . . PAGE 189 



CHAPTER IX. 



ON THE ELEVATION OF THE WESTERN COAST OF SOUTH AMERICA. 



Chonos Archipelago — Chiloe, recent and gradual elevation of, tradi- 

 tions of the inhabitants on this subject — Oncepcion, earthquake 

 and elevation of. Valparaiso, great elevation of, upraised 

 shells, earth of marine origin, gradual rise of the land within the 

 historical period. Coquimbo, elevation of, in recent times ; 

 terraces of marine origin, their inclination, their escarpments 

 not horizontal — Guasco, gravel terraces of — Copiapo. Perc — 

 Upraised shells of Cobija, Iquique, and Arica — Lima, shell-beds 

 and sea-beach on San Lorenzo — -Human remains, fossil earthen- 

 ware, earthquake debacle, recent subsidence — On the decay of 

 upraised shells — General summary ..... 232 



CHAPTER X. 



on the plains and valleys of chile :— salifeeous super- 

 ficial deposits. 



Basin-like plains of Chile ; their drainage, their marine origin — 

 Marks of sea-action on the eastern flanks of the Cordillera — 

 Sloping-terrace-like fringes of stratified shingle within the valleys 

 of the Cordillera : their marine origin — Boulders in the valley of 

 the CachaDual — Horizontal elevation of the Cordillera — Forma- 



