The 133rd Annual Meeting of the Geological Society of Japan
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Session OralT18[Topic] History of the EarthEDI: Equality, Diversity, Inclusion

T18[Topic] History of the Earth

Mon. Sep 14, 2026 8:45 AM - 12:00 PM JST
Mon. Sep 14, 2026 11:45 PM - 3:00 AM UTC
oral room 7(Lecture room 111-112)
Chiar:Hiroki MATSUI, Honami SATO, Kent MOTOMURA
8:45 AM - 9:00 AM JST(11:45 PM - 12:00 AM UTC)

[T18-O-13]Record of Oceanic Anoxic Event 2 (OAE2) in Cretaceous platform carbonates of the Middle East and its geological implications

*Kazuyuki Yamamoto1, Hideko Takayanagi2, Mariam Aljneibi3, Zahra Al Farhan4, Tokiyuki Sato5, Yoshihiro Tsuji1, Yasufumi Iryu2 (1. INPEX Corporation, 2. Tohoku Univ., 3. XRG, 4. ADNOC Offshore, 5. Akita Univ.)
Comment()
9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)entry

[T18-O-14]Differences in the environmental responses between the shelf and the deep-sea to the Mid-Cretaceous Oceanic Anoxic Event along the Southeastern margin of the Tethys Ocean

*Retsu Nishiyama1, Takashi Hasegawa2 (1. Division of geosciences and and civil enginieering, Graduate School of Natural Science and Technology, Kanazawa University, 2. Faculty of Geosciences and Civil Engineering, Institute of Science and Engineering, Kanazawa University)
Comment()
9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)entryECS: Early Career Scientist

[T18-O-15]Osmium and carbon isotopic records across the Lower Cretaceous Aptian–Albian boundary in the Monobegawa and Sanchu Groups, Japan

*Yui TSUKADA1, Hironao MATSUMOTO1, Shigehiro FUJINO1, Katsuhiko SUZUKI2, Takashi SANO3, Ryuji HATTORI4, Mahiro YUMIBA4, Toshikazu FURUYA4, Nanase SHINOMIYA4, Kazutada TSUDA4, Yoshihiro MORINO5 (1. Univ. of Tsukuba, 2. JAMSTEC, 3. Nat. Mus. Natu. Sci., 4. Univ. of Tokyo, 5. Pacific Consultants Co.,Ltd)
Comment()
9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)ECS: Early Career Scientist

[T18-O-16]Geological and paleomagnetic study of contact metamorphic rocks around the north-eastern margin of the Cretaceous Toki granite in Gifu prefecture, central Japan

*Akihiro TANIMOTO1, Hiroyuki HOSHI2 (1. Department of Earth Science, Ibaraki University, 2. Aichi University of Education)
Comment()
9:45 AM - 10:15 AM JST(12:45 AM - 1:15 AM UTC)

[T18-O-17](Invited) Mesozoic Insect Fossils from Japan: Insights into Changes in Insect Communities and Terrestrial Ecosystems

*Nozomu Oyama1 (1. Fukui Prefectural University)
Comment()
10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

Break

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[T18-O-18]Bayesian inference of mode of mass extinction in ammonoids based on morphological data and adaptive landscape

*Takao Ubukata1 (1. Kyoto University)
Comment()
10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)entryECS: Early Career Scientist

[T18-O-19]Integrated stratigraphy across the Late Triassic to Early Jurassic interval of the pelagic-bedded chert in the Mino Belt, Inuyama area

*Shotaro OMORI1, Kento MOTOMURA1, Tetsuji ONOUE1, Honami SATO1 (1. Kyushu University)
Comment()
11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)ECS: Early Career Scientist

[T18-O-20]Radiolarian faunal change across the Triassic-Jurassic boundary in Panthalassa

*Yuki Tomimatsu1, Kent Motomura2, Rigo Manuel3, Tetsuji Onoue2 (1. Fukuoka Univ., 2. Kyushu Univ., 3. University of Padova)
Comment()
11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[T18-O-21]Origin of a Panthalassan Large Igneous Province recorded in the Carnian (Upper Triassic) basalts from the Sambosan Belt, Japan

*Tetsuji Onoue1, Tomonari Kandabashi1, Katsuyuki Yamashita2 (1. Kyushu Univ., 2. Okayama Univ.)
Comment()
11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)entry

[T18-O-22]Litho-, bio-, and carbon-isotope stratigraphy across the Lower- Middle Triassic deep-sea chert gap in the Hisuikyo section, Mino Belt

*Junyo MIYAOKA1, Sota KAIEDA1, Kento MOTOMURA1, Shun David MUTO2, Tetsuji ONOUE1 (1. Kyushu Univ, 2. Geological Survey of Japan, AIST)
Comment()
11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)entryECS: Early Career Scientist

[T18-O-23]Deep Microbial Investigation and Contamination Assessment of Bushveld Complex Drilling Project (BVDP)

*Taro Kido1,2, Mariko Kouduka1,2, Hiroki Suga3, Toshiaki Ina3, Takahiro Kawai3, Takanori Wakita3, Takuma Kaneko3, Tomoya Uruga2,3, Masaki Oura2, Yohey Suzuki1,2 (1. Department of Earth and Planetary Sciences, The University of Tokyo, 2. RIKEN, 3. JASRI)
Comment()
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