The response of palaeomagnetic data to Earth expansion
Version of Record online: 2 APR 2007
Geophysical Journal of the Royal Astronomical Society
Volume 61, Issue 1, pages 95–100, April 1980
How to Cite
Schmidt, P. W. and Clark, D. A. (1980), The response of palaeomagnetic data to Earth expansion. Geophysical Journal of the Royal Astronomical Society, 61: 95–100. doi: 10.1111/j.1365-246X.1980.tb04306.x
- Issue online: 6 MAY 2009
- Version of Record online: 2 APR 2007
- Received 1979 July 20
Summary. Attempts to estimate palaeo-radii of the Earth, using palaeomagnetic data have necessarily been based on simplistic Earth models. It has been asserted that real geological processes are too complex to enable us to approach the problem quantitatively, and such attempts yield invalid results. We examine this and argue that, to the contrary, it appears that errors introduced by allowing for more realistic behaviour of the continents, e.g. ‘orange-peel effect’ and crustal extension, are smaller by an order of magnitude than the response of palaeomagnetic data to simplified expansion models.
From a qualitative argument, it is shown that the observed Late Palaeozoic and Early Mesozoic palaeomagnetic data are not what should be expected from an expanded Earth. We conclude that it appears unlikely that the Earth has expanded significantly since the Early Mesozoic.