Abstract
Palaeomagnetic evidence suggests that the principal cratonic areas of Africa were approximately in their present relative positions and orientations as early as 2,200 m.y. BP. This implies that the younger orogenic belts between them did not result from convergence of widely separated forelands which previously belonged to unrelated plates. South America and, until about 1,000 m.y. BP, North America may have been joined to Africa, and the concentration of all continental crust in one large mass until that time remains a possibility.
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PIPER, J., BRIDEN, J. & LOMAX, K. Precambrian Africa and South America as a Single Continent. Nature 245, 244–248 (1973). https://doi.org/10.1038/245244a0
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DOI: https://doi.org/10.1038/245244a0
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