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The palaeomagnetism of some igneous rocks from Antarctica

Published online by Cambridge University Press:  27 October 2009

D. J. Blundell
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Extract

A century ago geologists first began to consider the possibility of large lateral shifts of the continents. Reconstructions of the ancient positions of the continents have been proposed at various times since to try to explain past climatic zones, faunal distributions, similar orogenic sequences and structural trends on adjacent continents, and many other detailed geological events. Prominent amongst the hypotheses is that generally known as the Continental Drift Hypothesis, developed independently by F. B. Taylor and A. Wegener fifty years ago and later modified by A. L. du Toit andothers. In this hypothesis two primeval continents, Laurasia and Gondwanaland, are supposed to have formed at the north and south poles, to have broken up and possibly to have grown, and the pieces to have drifted to the positions of the present continents. The continents are moved around by forces of unknown origin and their interaction with each other and with the substratum gives rise to orogenesis. Due in large part to the lack of any known forces capable of producing these movements the hypothesis is nowadays less favoured than others requiring no drift. Recently, however, the study of palaeomagnetism has provided an independent line of evidence. From it the ancient latitudes and orientations of the continents can be worked out and relative displacements may possibly be revealed.

Type
Articles
Information
Polar Record , Volume 10 , Issue 67 , January 1961 , pp. 349 - 352
Copyright
Copyright © Cambridge University Press 1961

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References

1Blundell, D. J. and Stephenson, P. J.. Palaeomagnetism of some dolerite intrusions from the Theron Mountains and Whichaway Nunataks, Antarctica. Nature, Vol. 184, No. 4702, 1959, p. 1860.Google Scholar
2Turnbull, G.. Some Palaeomagnetic measurements in Antarctica. Arctic, Vol. 12, No. 3, 1959, p. 151–57.Google Scholar
3Bull, C. and Irving, E.. The palaeomagnetism of some hypabyssal intrusive rocks from South Victoria Land, Antarctica. Geophysical Journal, Vol. 3, No. 2, 1960, p. 211–24.Google Scholar
4Creer, K. M.. Preliminary palaeomagnetic measurements from South America. Annales de Géophysique, Vol. 14, No. 3, 1958, p. 373–90.Google Scholar
5Graham, K. W. T. and Hales, A. L.. Palaeomagnetic measurements on Karroo Dolerites. Advances in Physics, Vol. 6, No. 22, 1957, p. 149–61.Google Scholar
6Irving, E.. The magnetization of the Mesozoic dolerites of Tasmania. Papers and Proceedings of the Royal Society of Tasmania, Vol. 90, p. 157–68.Google Scholar
7Clegg, J. A., Radakrishnamurty, C. and Sahasrabudhe, P. W.. Remanent magnetism of the Rajmahal Traps of North-Eastem India. Nature, Vol. 181, No. 4612, 1958, p. 830–31.CrossRefGoogle Scholar