Japan Geoscience Union Meeting 2016

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

[S-GL39] Lower-Middle Pleistocene Boundary GSSP in the Kazusa Group

Tue. May 24, 2016 9:00 AM - 10:30 AM 201B (2F)

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.

9:00 AM - 9:15 AM

[SGL39-01] Sedimentary facies of the Byakubi-E tephra bed (Byk-E) just below the Matuyama-Brunhes Polarity Chronozone boundary in Boso Peninsula, central Japan

*Yoshihiro Takeshita1, Yasufumi Satoguchi2, Hiroomi Nakazato3, Osamu Kazaoka4, Makoto Okada5, Nishida Naohisa6, Kentaro Izumi7, Takeshi Yoshida4, Kagawa Atsushi4, Itaru Ogitsu4, Yabusaki Hisashi4, Yusuke Suganuma8 (1.Shinshu University Faculty of Education, 2.Lake Biwa Museum, 3.National Institute for Rural Engineering, 4.Research Institute of Environmental Geology, 5.Ibaraki Univeristy, 6.Geological survery of Japan, AIST, 7.National Institute for Environmental Studies, 8.National Institute of Polar Research)

9:30 AM - 9:45 AM

[SGL39-03] Orbital and suborbital scale paleoceanographic features for marine isotope stage 19 from the Chiba section well correlated with those from Osaka Bay and North Atlantic

*Masayuki Hyodo1, Ikuko Kitaba2, Shigehiro Katoh3, Hiroki Hayashi4, Akihisa Kitamura5, Makoto Okada6 (1.Research Center for Inland Seas, Kobe University, 2.Ritsumeikan University Research Centre for Palaeoclimatology, 3.Division of Natural History, Hyogo Museum of Nature and Human Activities, 4.Interdisciplinary Faculty of Science and Engineering, Shinmane University, 5.Institute of Geosciences, Faculty of Science, Shizuoka University, 6.Department of Earth Sciences, Faculty of Science, Ibaraki University)

9:45 AM - 10:00 AM

[SGL39-04] Planktonic foraminiferal biostratigraphy and paleoceanographic reconstruction of the Pleistocene Kokumoto Formation, Kazusa Group in the Boso Peninsula, Japan

*Kizuku Shikoku1, Hiroki Hayashi2, Ryu Taniguchi3, David L. Dettman4, Masayuki Hyodo3 (1.Interdisciplinary Faculty of Science and Engineering, Shimane University, 2.Interdisciplinary Graduate School of Science and Engineering, Shimane University, 3.Research Center for Inland Seas, Kobe University, 4.University of Arizona)

10:00 AM - 10:15 AM

[SGL39-05] Detailed variations in diatom assemblages across the Matuyama-Brunhes magnetic polarity boundary from a core collected adjacent to the Chiba section, central Japan

*Ikuko Tanaka1,2, Masayuki Hyodo1,3, Yuusuke Ueno1, Ikuko Kitaba4, Hiroshi Sato5 (1.Department of Earth and Planetary Sciences, Kobe University, 2.The Japan Society for the Promotion of Science, Research Fellow, 3.Research Center for Inland Seas, Kobe University, 4.Research Organization of Science and Technology/Research Centre for Palaeoclimatology, Ritsumeikan University, 5.Institute of Natural and Environmental Sciences, Univ. of Hyogo)

10:15 AM - 10:30 AM

[SGL39-06] High resolution magnetostratigraphy of the Matuyama-Brunhes transition from oriented samples from the Chiba Section, central Japan

*Koyo Kumazawa1, Masayuki Hyodo1,2, Kotaro Hirose1,2, Kosuke Tsumura1, Shigehiro Katoh3, Osamu Kazaoka4, Itaru Ogitsu4, Hisashi Yabusaki4, Hiroki Hayashi5 (1.Department of Planetology, Kobe University, 2.Research Center for Inland Seas, Kobe University, 3.Hyogo Museum of Nature and Human Activities, 4.Research Institute of Environmental Geology, Chiba, 5.Shimane University)