Preliminary Palaeomagnetic Study of Igneous Rocks from Abrolhos Islands, Brazil

Preliminary Palaeomagnetic Study of Igneous Rocks from Abrolhos Islands, Brazil

THERE are few palaeomagnetic data on Cainozoic rocks from the South American block1-4, and these data refer to the Upper Cainozoic. The geological information and radiometric data indicate a Middle-Lower Cainozoic age for the igneous rocks of Abrolhos Islands5,6. The palaeomagnetic study of these ro...

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Bibliographic Details
Published in:Nature. Physical science (London) Vol. 240; no. 103; pp. 163 - 164
Main Authors: PACCA, I. G, VALENCIO, D. A
Format: Journal Article
Language:English
Published: 18-12-1972
Online Access:Get full text
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Summary:THERE are few palaeomagnetic data on Cainozoic rocks from the South American block1-4, and these data refer to the Upper Cainozoic. The geological information and radiometric data indicate a Middle-Lower Cainozoic age for the igneous rocks of Abrolhos Islands5,6. The palaeomagnetic study of these rocks could clarify the chronology of Cainozoic geomagnetic reversals and some geological problems of the islands, and possibly allow the calculation of a Middle-Lower Cainozoic geomagnetic pole for South America.
ISSN:0300-8746
2058-1106
DOI:10.1038/physci240163a0