High Geomagnetic Intensity during the Mid-Cretaceous from Thellier Analyses of Single Plagioclase Crystals

Recent numerical simulations have yielded the most efficient geodynamo, having the largest dipole intensity when reversal frequency is low. Reliable paleointensity data are limited but heretofore have suggested that reversal frequency and paleointensity are decoupled. We report data from 56 Thellier...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 2001-03, Vol.291 (5509), p.1779-1783
Hauptverfasser:	Tarduno, John A., Cottrell, Rory D., Smirnov, Alexei V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Basalt Cretaceous Cretaceous period Crystals Demagnetization Earth Earth sciences Earth, ocean, space Exact sciences and technology Geology Geology, Stratigraphic Geophysics: general, magnetic, electric and thermic methods and properties Internal geophysics Lava flows Magnetic fields Magnetism Magnetization Mineralogy Plagioclase Plagioclases Prehistoric era Secular variations Simulation Stratigraphy Virtual geomagnetic pole
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