Geological Observations on South America
Free

Geological Observations on South America

By Charles Darwin
Free
Book Description
Table of Contents
  • GEOLOGICAL OBSERVATIONS ON SOUTH AMERICA
  • EDITORIAL NOTE.
  • PLATE I. GEOLOGICAL SECTIONS THROUGH THE CORDILLERAS.
    • PLATE II. MAP OF SOUTHERN PORTION OF SOUTH AMERICA.
    • TABLE OF CONTENTS.
      • CRITICAL INTRODUCTION.
      • CHAPTER I.—ON THE ELEVATION OF THE EASTERN COAST OF SOUTH AMERICA.
      • CHAPTER II.—ON THE ELEVATION OF THE WESTERN COAST OF SOUTH AMERICA.
      • CHAPTER III.—ON THE PLAINS AND VALLEYS OF CHILE:—SALIFEROUS SUPERFICIAL DEPOSITS.
      • CHAPTER IV.—ON THE FORMATIONS OF THE PAMPAS.
      • CHAPTER V.—ON THE OLDER TERTIARY FORMATIONS OF PATAGONIA AND CHILE.
      • CHAPTER VI.—PLUTONIC AND METAMORPHIC ROCKS:—CLEAVAGE AND FOLIATION. Brazil, Bahia, gneiss with disjointed metamorphosed dikes.—Strike of foliation.—Rio de Janeiro, gneiss-granite, embedded fragment in, decomposition of.—La Plata, metamorphic and old volcanic rocks of.—S. Ventana.—Claystone porphyry formation of Patagonia; singular metamorphic rocks; pseudo-dikes.—Falkland Islands, palaeozoic fossils of.—Tierra del Fuego, clay-slate formation, cretaceous fossils of; cleavage and foliation; form of land.—Chonos Archipelago, mica-schists, foliation disturbed by granitic axis; dikes.—Chiloe.—Concepcion, dikes, successive formation of.—Central and Northern Chile.—Concluding remarks on cleavage and foliation.—Their close analogy and similar origin.—Stratification of metamorphic schists.—Foliation of intrusive rocks.—Relation of cleavage and foliation to the lines of tension during metamorphosis.
      • CHAPTER VII.—CENTRAL CHILE:—STRUCTURE OF THE CORDILLERA.
      • CHAPTER VIII.—NORTHERN CHILE.—CONCLUSION.
    • INDEX.
  • GEOLOGICAL OBSERVATIONS ON SOUTH AMERICA
  • CRITICAL INTRODUCTION.
    • CHAPTER I. ON THE ELEVATION OF THE EASTERN COAST OF SOUTH AMERICA.
      • CHAPTER II. ON THE ELEVATION OF THE WESTERN COAST OF SOUTH AMERICA.
      • CHAPTER III. ON THE PLAINS AND VALLEYS OF CHILE:—SALIFEROUS SUPERFICIAL DEPOSITS.
      • CHAPTER IV. ON THE FORMATIONS OF THE PAMPAS.
      • CHAPTER V. ON THE OLDER TERTIARY FORMATIONS OF PATAGONIA AND CHILE.
      • CHAPTER VI. PLUTONIC AND METAMORPHIC ROCKS:—CLEAVAGE AND FOLIATION.
      • CHAPTER VII. CENTRAL CHILE:—STRUCTURE OF THE CORDILLERA.
      • CHAPTER VIII. NORTHERN CHILE. CONCLUSION.
      • INDEX.
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