Geological Observations on South America: Being the Third Part of the Geology of the Voyage of the Beagle, under the Command of Capt. Fitzroy, R. N. during the Years 1832 to 1836

Charles Darwin

doi:10.1017/CBO9780511910180

First published in 1846, Darwin's Geological Observations made up the third part of his memoir of his voyage on the Beagle during the years 1832–1836. While the first part (1842) focused on the structure and distribution of coral reefs and the second (1844) described the volcanic islands visited during the voyage, this third instalment is devoted exclusively to South America, where Darwin spent the longest period of the expedition. It discusses South America's geological and seismic history, the mineral content of lava and granite, and the deformation of metamorphic rock. Separate chapters cover different geographical areas, and topics include the formation of the East and West Coasts and the pampas, the plains and valleys of Chile, and the structure of the Cordillera. Geological Observations also includes detailed maps of South America and sketches of the terrain.

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Contents

Frontmatter
pp i-ii
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PREFACE
pp iii-iv
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Contents
pp v-vii
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DIRECTIONS FOR THE BINDER
pp viii-viii
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CHAPTER I - ON THE ELEVATION OF THE EASTERN COAST OF SOUTH AMERICA
pp 1-26
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CHAPTER II - ON THE ELEVATION OF THE WESTERN COAST OF SOUTH AMERICA
pp 27-57
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CHAPTER III - ON THE PLAINS AND VALLEYS OF CHILE:—SALIFEROUS SUPERFICIAL DEPOSITS
pp 58-75
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CHAPTER IV - ON THE FORMATIONS OF THE PAMPAS
pp 76-107
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CHAPTER V - ON THE OLDER TERTIARY FORMATIONS OF PATAGONIA AND CHILE
pp 108-139
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CHAPTER VI - PLUTONIC AND METAMORPHIC ROCKS : —CLEAVAGE AND FOLIATION
pp 140-168
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CHAPTER VII - CENTRAL CHILE; STRUCTURE OF THE CORDILLERA
pp 169-207
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CHAPTER VIII - NORTHERN CHILE; CONCLUSION
pp 208-248
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APPENDIX
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Descriptions of fossil tertiary shells, by G. B. Sowerby, Esq., F.L.S., &c.
pp 249-264
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Descriptions of fossil secondary shells, by Professor E.Forbes, F.R.S., &c.
pp 265-268
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INDEX
pp 269-279
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Plate section
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Geological Observations on South America

Being the Third Part of the Geology of the Voyage of the Beagle, under the Command of Capt. Fitzroy, R. N. during the Years 1832 to 1836

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Contents

Frontmatter
pp i-ii

PREFACE
pp iii-iv

Contents
pp v-vii

DIRECTIONS FOR THE BINDER
pp viii-viii

CHAPTER I - ON THE ELEVATION OF THE EASTERN COAST OF SOUTH AMERICA
pp 1-26

CHAPTER II - ON THE ELEVATION OF THE WESTERN COAST OF SOUTH AMERICA
pp 27-57

CHAPTER III - ON THE PLAINS AND VALLEYS OF CHILE:—SALIFEROUS SUPERFICIAL DEPOSITS
pp 58-75

CHAPTER IV - ON THE FORMATIONS OF THE PAMPAS
pp 76-107

CHAPTER V - ON THE OLDER TERTIARY FORMATIONS OF PATAGONIA AND CHILE
pp 108-139

CHAPTER VI - PLUTONIC AND METAMORPHIC ROCKS : —CLEAVAGE AND FOLIATION
pp 140-168

CHAPTER VII - CENTRAL CHILE; STRUCTURE OF THE CORDILLERA
pp 169-207

CHAPTER VIII - NORTHERN CHILE; CONCLUSION
pp 208-248

APPENDIX

Descriptions of fossil tertiary shells, by G. B. Sowerby, Esq., F.L.S., &c.
pp 249-264

Descriptions of fossil secondary shells, by Professor E.Forbes, F.R.S., &c.
pp 265-268

INDEX
pp 269-279

Plate section

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Geological Observations on South America

Being the Third Part of the Geology of the Voyage of the Beagle, under the Command of Capt. Fitzroy, R. N. during the Years 1832 to 1836

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