Fig. 6

Stepwise alternating field demagnetization (AFD) curves of the studied samples from the Irabu knolls of the Okinawa Trough; 6K#569R4-2 (a), 6K#569R4-3 (b), 6K#562R1 (c), and 6K#569R4-1 (d). Gray and solid black circles represent projections on vertical and horizontal planes, respectively. Inclination and declination are relative because lava samples are not oriented