Abstract
The directions of remanent magnetization in igneous rocks from Heard Island show both negative and positive polarities. Their mean, irrespective of sign, is close to the hypothetical axial geocentric dipole field but differs from it by an amount which is about equal to the error in the determination. This divergence may not be real and requires further study, but if it is real it could be explained by a southerly movement of Heard Island during the Cenozoic as suggested by J. T. Wilson's hypothesis of earth behavior. More detailed sampling at Heard and also in the Kerguelen archipelago could provide a critical test for this hypothesis. The dispersion of directions is measured by a circular standard deviation of 11°, which is much less than the secular variation in these southern latitudes today.
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