T. Pick et L. Tauxe, GEOMAGNETIC PALAEOINTENSITIES DURING THE CRETACEOUS NORMAL SUPERCHRONMEASURED USING SUBMARINE BASALTIC GLASS, Nature, 366(6452), 1993, pp. 238-242
High-quality palaeointensity data have been obtained from Thellier-The
llier experiments on recent and Cretaceous submarine basaltic glasses.
Whereas the recent samples faithfully yield today's geomagnetic inten
sity at the site, the palaeointensities for the beginning and end of t
he Cretaceous normal superchron are only 45% and 25%, respectively, of
today's value. The data thus extend the 'Mesozoic dipole low' into th
e Cretaceous superchron, and confirm that submarine basaltic glass is
an excellent material for palaeointensity studies.