Figure F77. Results of alternating field (AF) demagnetization experiments. A. AF demagnetization of an archive half core piece using the in-line demagnetizing coils of the superconducting rock magnetometer (SRM) system (Sample 312-1256D-231R-3A, 54 cm). Natural remanent magnetization (NRM) to 40 mT data from shipboard measurements performed during Expedition 312; 40–80 mT data from measurements performed during Expedition 335. B. AF demagnetization of the equivalent working half piece (0–80 mT; Sample 335(312)-1256D-231R-3W, 54 cm) performed entirely during Expedition 335.
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