Japan Geoscience Union Meeting 2015

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Symbol S (Solid Earth Sciences) » S-GL Geology

[S-GL38] Lower-Middle Pleistocene Boundary GSSP in the Kazusa Group

Mon. May 25, 2015 10:00 AM - 10:45 AM 102B (1F)

Convener:*Makoto Okada(Department of Earth Sciences, Faculty of Science, Ibaraki University), Yusuke Suganuma(National institute of Polar Research), Osamu Kazaoka(Research Institute of Environmental Geology, Chiba), Chair:Makoto Okada(Department of Earth Sciences, Faculty of Science, Ibaraki University)

The Lower-Middle Pleistocene Boundary GSSP, which is placed to be around the Matuyama-Brunhes boundary, is going to be ratified in 2016. Three candidates (Montalbano Jonic, Valde di Manche and the Chiba Section) have been proposed so far. The aim of this session is to facilitate GSSP ratification at the Chiba Section through discussion for stratigraphic, chronologic and sedimentological studies regarding with the Mid Kazusa Group.

10:00 AM - 10:15 AM

[SGL38-01] The Chiba composite section (a candidate of the L-M Pleistocene GSSP): recent advances and future perspectives

*Yusuke SUGANUMA1, Makoto OKADA1, Osamu KAZAOKA2, Koji KAMEO3, Martin J. Head4, Naohisa NISHIDA5, Takeshi YOSHIDA6, Itaru OGITSU6, Shun KAMEYAMA6, Hiroomi NAKAZATO7, Kentaro IZUMI8, Yoshimi KUBOTA9, Manami SUGAYA2, Hisashi NIREI6, Hisao KUMAI10 (1.National Institute of Polar Research, 2.Ibaraki Univeristy, 3.Chiba University, 4.Brock University, 5.Geological survery of Japan, AIST, 6.Research Institute of Environmental Geology, 7.National Institute for Rural Engineering, 8.National Institute for Environmental Studies, 9.National Museum of Nature and Science, 10.Osaka City University)

10:15 AM - 10:30 AM

[SGL38-02] Litho-stratigraphy and sedimentary environment of upper part of Kokumoto Formation with the L-M Pleistocene boundary

*Osamu KAZAOKA1, Naohisa NISHIDA2, Makoto OKADA3, Yusuke SUGANUMA4, Shun KAMEYAMA5, Takeshi YOSHIDA1, Masaaki MORISAKI1, Atsushi KAGAWA1, Itaru OGITSU1, Kentaro IZUMI6, Hiroomi NAKAZATO7, Hisao KUMAI8, Hisashi NIREI9 (1.Research Institute of Environmental Geology, Chiba, 2.Geological Survey of Japan, AIST, 3.Ibaraki University, 4.National Institute of Polar Research, 5.Environmental Protection division of Chiba Prefectural Government, 6.University of Tokyo, 7.National Institute for Rural Engineering, 8.Osaka City University, 9.Japan Branch of Geoscience for Environmental Management, IUGS)

10:30 AM - 10:45 AM

[SGL38-03] Ichnofossils and ichnofabrics of the Kokumoto Formation, Kazusa Group: Depositional environment and benthic paleoecology

*Kentaro IZUMI1, Naohisa NISHIDA2, Osamu KAZAOKA3, Yusuke SUGANUMA4, Makoto OKADA5, Takeshi YOSHIDA3, Itaru OGITSU3, Hiroomi NAKAZATO6, Shun KAMEYAMA3, Atsushi KAGAWA3, Masaaki MORISAKI3, Masayuki HYODO7, Hisashi NIREI8 (1.Center for Environmental Biology and Ecosystem Studies, NIES, 2.Institute of Geology and Geoinformation, Geological Survey of Japan, AIST, 3.Research Institute of Environmental Geology, Chiba, 4.National Institute of Polar Research, 5.Department of Earth Sciences, Faculty of Science, Ibaraki University, 6.National Institute for Rural Engineering, 7.Research Center for Inland Seas, Kobe University, 8.International Union of Geological Science for Environmental Management)