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Shun Chiyonobu
Institute of Geology and Paleontology, Graduate School of Science, Tohoku University
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Hayato Saruwatari
Institute of Geology and Paleontology, Graduate School of Science, Tohoku University
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Tokiyuki Sato
Institute of Applied Earth Sciences, Faculty of Engineering and Resource Science, Akita University
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Junichi Kabamoto
Agriculture, Forestry and Fisheries Department, Okinawa General Bureau, Cabinet Office, Government of Japan Present address; Resources Division, Rural Policy Planninng Department, Chugoku-Shikoku Regional Agricultural Administration Office, Ministry of Agriculture, Forestry and Fisheries
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Yasufumi Iryu
Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University