Japan Geoscience Union Meeting 2016

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Poster

Symbol H (Human Geosciences) » H-QR Quaternary research

[H-QR15] Diachronic dynamics of human-environment interactions

Thu. May 26, 2016 3:30 PM - 4:45 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Toshihiko Sugai(Department of Natural Environmental Studies, Institute of Environmental Studies, Graduate School of Frontier Science, The University of Tokyo), Kiyohide Mizuno(Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology), Minoru YONEDA(The University Museum, The University of Tokyo)

3:30 PM - 4:45 PM

[HQR15-P02] Stratigraphy of the Middle to Late Pleistocene in the southwest Hokkaido, Japan

*Akihiro Yokota1, Reisuke Kondo2 (1.Meiji Consultant Co., Ltd, 2.Educational Development Center, Kogakkan University)

Keywords:southwestern Hokkaido, Setana Formation, Stratigraphy

The Middle to Late Pleistocene Setana Formation and Ohyachi Formation is distributed in Setana Plain, southwestern Hokkaido, North Japan. The Setana Formation consists of tuffaceous sandstone in Setana Plain. This is sandwiched by the Ohya Formation and Kuromatunai Formation.
Sedimentary age of Setana Formation has been estimated to be 1.2 Ma to 0.6 Ma by biostratigraphic investigation. But there aren’t a lot of previous research about Stratigraphic Relation between Ohyachi Formation and Setana Formation and that’s geomorphic development.
Recently, Kondo et al. (2016) got Setana Formation’s and Ohyachi Formation’s conclusive age by OSL. The purpose of this study is to clarify the Stratigraphic Relation and the paleo-environment by Sedimentary age.