The 133rd Annual Meeting of the Geological Society of Japan
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Session OralT16[Topic] Regional geology and stratigraphy: comprehensive understanding

T16[Topic] Regional geology and stratigraphy: comprehensive understanding

Sun. Sep 13, 2026 8:45 AM - 12:00 PM JST
Sun. Sep 13, 2026 11:45 PM - 3:00 AM UTC
oral room 2(AV lecture room)
Chiar:Mitsuhiro NAGATA, Sato, Daisuke
8:45 AM - 9:00 AM JST(11:45 PM - 12:00 AM UTC)

[T16-O-1]A hyper-time-resolution paleomagnetic record of the Gauss-Matuyama geomagnetic reversal from a boring core of a Plio-Pleistocene marine succession in the southernmost part of the Boso Peninsula, Japan

*Makoto Okada1, Ryoka Yuhara1, Daiki Nagatomo1, Yusuke Suganuma2 (1. Ibaraki University, 2. National Institute of Polar Research)
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9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[T16-O-2]Stratigraphy and sedimentary age of the basal Kazusa Group exposed in Onaura, Katsuura City, eastern Boso Peninsula

*Masayuki Utsunomiya1, Yuki Haneda1 (1. Geological Survey of Japan, AIST)
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9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)

[T16-O-3]Holocene deposits in Tsukuriyama Kofun Area, Okayama Prefecture, Japan

*Shigeyuki Suzuki1, Jun Mitsumoto1, Yuji Yamaguchi2, Masashi Mori3, Yuuya Tsujimoto3 (1. Okayama University, 2. Tokushima University, 3. Paleo Labo Co., Ltd.)
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9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)entryECS: Early Career Scientist

[T16-O-4]Organic carbon isotope stratigraphy and redox conditions of the Lower Cretaceous Hinagu Formation in the Kurosegawa Belt, western Kumamoto, Japan

*Kohei KAWAKAMI1, Kento Motomura1, Tetsuji Onoue1 (1. Kyushu Univ.)
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9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)

[T16-O-5]Sedimentary facies, sequence, and chorono-stratigraphy, and sedimentary history of the Upper Cretaceous Kuji Group, Northeast Japan: Perspectives from of examples of regional geology and stratigraphy researches

*Hisao ANDO1 (1. Fukui Prefectural University)
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10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)entryECS: Early Career Scientist

[T16-O-6]Investigation into the Factors Controlling the Formation of the Inoceramus uwajimensis Acme Zone Toward Proposing a SABS for the Turonian/Coniacian Boundary in the North Pacific Province

*Kosuke TAKAHASHI1, Reishi TAKASHIMA2, Masanari ARAO1, Toshiro YAMANAKA3, Taiga TOMARU1, Azumi KUROYANAGI2 (1. Department of Earth Science, Graduate School of Science, Tohoku University, 2. The Center for Academic Resources and Archives Tohoku University Museum, 3. Tokyo University of Marine Science and Technology)
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10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[T16-O-7]Sedimentary and Depositional Environment of the Basal Upper Cretaceous Izumi Group: An Unconformity at Shiroyama Coast, Higashikagawa, Japan

*Kazuki Takazawa1, Shoichi Kiyokawa1, Minoru Ikehara3, Kento Motomura1, Naoto Takahata2 (1. Kyushu Univ., 2. Atmosphere and Ocean Research Institute, The Univ. of Tokyo, 3. Marine Core Research Institute, Kochi Univ.)
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10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

Break

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[T16-O-8]Age estimation using molluscan fossils from the Otokawa Formation in the Toyama Prefecture, central Japan.

*Hideaki NAGAMORI1 (1. AIST)
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11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)ECS: Early Career Scientist

[T16-O-9]Two pulses of Paleocene magmatism in the Noto Peninsula, central Japan: New evidence from U–Pb zircon geochronology

*Mitsuhiro NAGATA1, Raiki YAMADA2, Sota NIKI3, Takafumi HIRATA4 (1. Department of Earth and Environmental Sciences, College of Humanities and Sciences, Nihon University, 2. Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology , 3. Institute for Space and Earth Environmental Research, Nagoya University, 4. Geochemical Research Center, the University of Tokyo)
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11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[T16-O-10]Magnetostratigraphy of the Nohi Rhyolites: an example of paleomagnetic dating of a volcano-plutonic complex

*Hiroyuki Hoshi1, Kazuki Sako2 (1. Aichi University of Education, 2. Chisato Junior High School)
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11:30 AM - 12:00 PM JST(2:30 AM - 3:00 AM UTC)

[T16-O-11](Invited) Lithostratigraphy of the Lower Miocene Iwaine Formation in the Yatsuo area, Toyama Prefecture, Japan: Eruptive style of large-scale volcanism during the opening of the Sea of Japan

*Raiki YAMADA1 (1. National Institute of Advanced Industrial Science and Technology)
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