Rotation of a polymetallic nodule in the Penrhyn Basin, South Pacific, tracked by the Earth’s magnetic field

Hirokuni Oda1, Wataru Katanoda2, Akira Usui2, Yuhji Yamamoto3 and Masafumi Murayama4, (1)National Institute of Advanced Industrial Science and Technology (AIST), Geological Survey of Japan, Tsukuba, Japan, (2)Kochi University, Kochi, Japan, (3)Kochi University, Center for Advanced Marine Core Research, Kochi, Japan, (4)Kochi University, Faculty of Agriculture and Marine Science, Nankoku, Japan