Despite the success of plate tectonics in explaining the evolution of the Earth's crust, there are still many who, following Carey (1958, 1976), believe that a more reasonable hypothesis is that the Earth has expanded with time. It is supposed that the continents form a scum on the surface of the Earth and maintain their primitive dimensions as the Earth expands underneath. Egyed (1960) was the first to point out that paleomagnetic data may be used to test the hypothesis of Earth expansion. In his paleomeridian method (Fig. 7.27a), if two widely separated paleomagnetic sampling sites are available for the same
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