Institution: | Department of Earth Sciences, Faculty of Science, Okayama University, Okayama 700–8530, Japan, (email:;Geoscience Institute, Hyogo University of Teacher Education, Hyogo 673-1494, Japan,;Rushurgent Working Group, National Institute of Geological Sciences, College of Science, University of the Philippines, Diliman, Quezon City 1101, The Philippines,;Mines and Geosciences Bureau, Diliman, Quezon City 1104, The Philippines,;Department of Geology, Faculty of Science, University of Ghana, Accra, Ghana |