Geomagnetic palaeointensities during the Cretaceous normal superchron measured using submarine basaltic glass

Details Geomagnetic palaeointensities during the Cretaceous normal superchron measured using submarine basaltic glass Geomagnetic palaeointensities during the Cretaceous normal superchron measured using submarine basaltic glass

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.366..238p&link_type=abstract

Nature, Volume 366, Issue 6452, pp. 238-242 (1993).

Physics

41

Scientific paper

High-quality palaeointensity data have been obtained from Thellier-Thellier experiments on recent and Cretaceous submarine basaltic glasses. Whereas the recent samples faithfully yield today's geomagnetic intensity at the site, the palaeointensities for the beginning and end of the Cretaceous normal superchron are only 45% and 25%, respectively, of today's value. The data thus extend the 'Mesozoic dipole low' into the Cretaceous superchron, and confirm that submarine basaltic glass is an excellent material for palaeointensity studies.

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