Geomagnetic Reversals during the Phanerozoic

Details Geomagnetic Reversals during the Phanerozoic Geomagnetic Reversals during the Phanerozoic

Apr 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971sci...172..157m&link_type=abstract

Science, Volume 172, Issue 3979, pp. 157-159

Mathematics

Logic

21

Scientific paper

An analysis of worldwide paleomagnetic measurements suggests a periodicity of 350 × 106 years in the polarity of the geomagnetic field. During the Mesozoic it is predominantly normal, whereas during the Upper Paleozoic it is predominantly reversed. Although geomagnetic reversals occur at different rates throughout the Phanerozoic, there appears to be no clear correlation between biological evolutionary rates and reversal frequency.

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