Age model and susceptibility of sediment core PS2212-3

A comprehensive rock magnetic study of the sediments proved that fine-grained magnetite is the principal carrier of the remanent magnetization. No changes in magneto-mineralogy across the polarity transitions in the sediments investigated were found.

Calcareous nannofossil biostratigraphy, AMS-14C (accelerated mass spectrometry) and oxygen isotope data, and 10Be and 230Th stratigraphies yielded age ranges of 24-29 Ka for the Mono Lake event, 34-43 Ka for the Laschamp event, 72-86 Ka for the Norwegian-Greenland Sea event and 118-128 Ka for the Blake event. Two reverse polarity samples at the base of core PS2212-3 KAL are interpreted as the termination of the Biwa I event (171-181 Ka). the events exhibit full inversion of inclination in both cores. the data suggest that the transition process of the Earth's magnetic field during such polarity events requires some 1 Ka.