Recent Progress in Paleomagnetic and Rock-magnetic Studies of the Quaternary in Japan
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Detailed secular variation records of geomagnetic field direction during the Holocene, derived from archeomagnetic and sedimentary magnetic studies in Japan, can be used as a time scale for intervals of 10<sup>2</sup>-10<sup>3</sup> years. Accumulated paleointensity data for the last 50kyr, from baked earth and volcanic rocks using the Thellier method, provide reliable age constraints for time intervals of 10<sup>3</sup>-10<sup>4</sup> years. The geomagnetic excursions and short reversal events found in Japan, which mostly coincided with paleointensity minima at intervals of 10<sup>4</sup>-10<sup>5</sup> years in the Pacific, are also useful for dating. Besides its chronological applications, magnetic analyses of sediments are useful in other areas of Quaternary studies.
- The Quat. Res.
The Quat. Res. 38(3), 202-208, 1999-06-01
Japan Association for Quaternary Research