Palaeomagnetism of South American Rocks and the Dynamic Processes Related with the Fragmentation of Western Gondwana

  1. M.W. McEIhinny and
  2. D.A. Valencio
  1. Juan F. A. Vilas

Published Online: 15 MAR 2013

DOI: 10.1029/GD002p0106

Paleoreconstruction of the Continents

Paleoreconstruction of the Continents

How to Cite

Vilas, J. F. A. (1981) Palaeomagnetism of South American Rocks and the Dynamic Processes Related with the Fragmentation of Western Gondwana, in Paleoreconstruction of the Continents (eds M.W. McEIhinny and D.A. Valencio), American Geophysical Union, Washington, D. C.. doi: 10.1029/GD002p0106

Author Information

  1. Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, 1428 - Buenos Aires, Argentina

Publication History

  1. Published Online: 15 MAR 2013
  2. Published Print: 1 JAN 1981

Book Series:

  1. Geodynamics Series

ISBN Information

Print ISBN: 9780875905112

Online ISBN: 9781118670217

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Keywords:

  • Fragmentation;
  • Geodynamic processes;
  • Palaeomagnetism;
  • Phanerozoic;
  • Precambrian;
  • South american rocks

Summary

The South American reliable palaeomagnetic data presented during the last decade are reviewed.

These data have contributed to define the different episodes of the geodynamic evolution of Western Gondwana; i) they suggest that Western Gondwana was a unit in Late Precambrian-Cambrian time; ii) they indicate that Western Gondwana moved away from the South pole in Late Carboniferous-Early Permian time; iii) they suggest that Western Gondwana had a quasi static period from late Early Permian to Middle Jurassic; and iv) they indicate that Western Gondwana had a rapid recurrent apparent polar shift in Early Cretaceous time and that its fragmentation occurred in late Early Cretaceous time.

The palaeomagnetic and sea-floor spreading data are used to define the movements associated with the fragmentation of Western Gondwana and the origin of the South Atlantic.