Computer Science
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.300..251h&link_type=abstract
Nature, vol. 300, Nov. 18, 1982, p. 251, 252.
Computer Science
31
Earth Surface, Geomagnetism, Geotemperature, Paleomagnetism, Plates (Tectonics), Polar Wandering (Geology), Errors, Reference Systems
Scientific paper
Hot spots, regions on the earth's surface overlying hot plumes of upwelling mantle material, and the mean geomagnetic dipole field have both been suggested as possible frames of reference with which to measure the absolute movement of the lithospheric plates over the surface of the earth. The present paper reports a comparison of the two frames of reference over the past 200 million years. Paths of apparent polar wandering calculated from paleomagnetic data from individual continents and from five continents combined were compared with polar positions calculated from the motions of the major continental plates with respect to a hot spot reference frame under the assumption that the hot spot reference frame is fixed with respect to the geomagnetic field. Relative motions of about 20 deg over 200 million years were found for the various continents, with the amount of motion varying with time. Results suggest a slow drift of the mantle layer within which the hot spots are fixed.
Harrison Christopher G. A.
Lindh T.
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