Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 200 Monobe-otsu, Nankoku, Nankoku, 783-8502, Japan
Research Center for Inland Seas, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, 657- 8501 Japan, Kobe, 657-8501, Japan
Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Higashi-Hiroshima, 739-8526, Japan
Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 200 Monobe-otsu, Nankoku, Nankoku, 783-8502, Japan
Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 200 Monobe-otsu, Nankoku, Nankoku, 783-8502, Japan