2:40 PM - 2:55 PM
Asako Suzuki2, *Ken Sawada1,2, Saki Yano2, Tomohisa Irino3 (1.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, 2.Division of Natural History Sciences, Graduate School of Science, Hokkaido University, 3.Faculty of Environmental Earth Science, Hokkaido University)