Session Details
T18[Topic] History of the Earth
Sun. Sep 13, 2026 1:30 PM - 3:00 PM JST
Sun. Sep 13, 2026 4:30 AM - 6:00 AM UTC
Sun. Sep 13, 2026 4:30 AM - 6:00 AM UTC
T18_poster(Academic Promenade)
[T18-P-1]Reconstructing Pleistocene environmental change at North Atlantic IODP Site U1305 using planktic foraminiferal assemblages and test morphology: implications for interglacial Arctic sea-ice melt
*Makoto YAMASAKI1, Keika SAWADA2, Rio HATAKEYAMA3, Shogo AOKI1, Minoru IKEHARA4 (1. Graduate school of International Resource Sciences, Akita University, 2. NEWJEC Inc., 3. Sendai City Hall, 4. Marine Core Research Institute, Kochi University)
[T18-P-2]Reconstruction of Middle Pleistocene environment based on foraminiferal oxygen isotope analysis of the Choshi core
*Yuri HARAI1, Daisuke KUWANO2, Yoshimi KUBOTA3, Mahsa Ortakand SAEIDI3, Koji KAMEO1 (1. Chiba University, 2. Kyoto University, 3. National Museum of Nature and Science)
[T18-P-3]Sea-surface environments in the northwestern Pacific around the Calabrian–Chibanian boundary based on planktonic foraminiferal assemblages
*Keisuke ONO1, Koji KAMEO1, Yusuke SUGANUMA2, Yuki HANEDA3, Makoto OKADA4 (1. Chiba University, 2. National Institute of Polar Research, 3. National Institute of Advanced Industrial Science and Technology, 4. Ibaraki University)
[T18-P-4]Age model for the middle part of the Kiwada Formation, Kazusa Group, based on oxygen isotope stratigraphy of benthic foraminifera
*Ayumi TAKEDA1, Daisuke KUWANO2, Yoshimi KUBOTA3, Mahsa Ortakand SAEIDI3, Masayuki UTSUNOMIYA4, Koji KAMEO1 (1. Chiba University, 2. Kyoto University, 3. National Museum of Nature and Science, 4. National Institute of Advanced Industrial Science and Technology)
[T18-P-5]Paleoceanographic changes based on foraminifera of the Lower Pleistocene Sasaoka Formation distributed in the Gojome area, Akita Prefecture
*Kibun KIKUCHI1, Tatsuya SEO2, Naoki NEMOTO3, Minoru IKEHARA4, Hiroki MATSUI1, Makoto YAMASAKI1 (1. Graduate School of International Resource Sciences, Akita University, 2. Sogo Geophysical Exploration Co., Ltd, 3. Graduate School of Science and Technology, Hirosaki University, 4. Marine Core Research Institute, Kochi University.)
[T18-P-6]Millennial variability in the lower limb of the Atlantic meridional overturning circulation from the latest Pliocene to the earliest Pleistocene
*Tatsuya HAYASHI1, Yoshihiro Kuwahara1, Masao Ohno1 (1. Kyushu University)
[T18-P-7]Oxygen isotope-magnetostratigraphy across the PRISM time-slab and time-slices from Pliocene marine successions in Boso and Miura peninsulas, central Japan
*Yuki Haneda1, Takaki Sato2, Hiroto Kajita2, Yoshimi Kubota3, Masayuki Utsunomiya1 (1. Geological Survey of Japan, AIST, 2. Hirosaki University, 3. National Museum of Nature and Science, Tokyo)
[T18-P-8]Indian Monsoon variability reconstructed from the Bay of Bengal sediments over the past 6 million years
*Yusuke KODAMA1, Takuto ANDO2, Ken SAWADA1,3 (1. Graduate school of science, Hokkaido University, 2. Faculty of International Resource Sciences, Akita University, 3. Faculty of science, Hokkaido University)
[T18-P-9]Integrated chronostratigraphy and age model reconstruction of Miocene sediment cores from the Japan Sea in ReCoRD
*Daisuke KUWANO1, Arisa SEKI2, Yuji KATO3, Kenji M. MATSUZAKI4, Hiroki HAYASHI5, Jumpei YOSHIOKA6, Yoshitaka NAGAHASHI7, Takuto ANDO8, Tomohisa IRINO9, Ryuji TADA10 (1. Kyoto University, 2. Fukada Geological Institute, 3. Kochi University, 4. The University of Tokyo, 5. Shimane University, 6. National Institute of Polar Research, 7. Fukushima University, 8. Akita University, 9. Hokkaido University, 10. Chiba Institute of Technology)
[T18-P-10]Upper oligocene–lower miocene calcareous nannofossil biostratigraphy in the south atlantic
*Reika WADA1, Koji KAMEO1, Nobuhiro DOI, Daisuke KUWANO2 (1. Chiba University, 2. Kyoto University)
[T18-P-11]Eocene planktic foraminifera biostratigraphy and strontium isotope stratigraphy in the South Pacific
*Hiroki Matsui1, Mizuki Tairabune1, Shigeyuki Wakaki2 (1. Akita Univ., 2. National Museum of Japanese History)
[T18-P-12]Paleoenvironmental Reconstruction of the K/Pg Boundary at the Um Sohryngkew River Section, India: Insights from Organic Molecular Analysis
*Naoya TAWARA1, Sarat PHUKAN2, Dipima BORGOHAIN3, Akihiro KANO4, Megumu FUJIBAYASHI5, Ryoko SENDA5, Ryosuke SAITO1 (1. Yamaguchi University, 2. Gauhati University, 3. Indian Institute of Technology Bombay, 4. Tokyo University of Marine Science and Technology, 5. Kyushu University)
[T18-P-13]Paleoenvironmental reconstruction of the eastern part of the Asian continental margin based on palynofacies and geochemical analyses focused on the Upper Cretaceous Yezo Group
*Taiga TOMARU1, Reishi Takashima2, Mariusz Niechwedowicz3, Masanari Arao1, 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. Faculty of Geology, University of Warsaw)
[T18-P-14]Stratigraphy across the Lower-Upper Cretaceous boundary and numerical ages of the Yezo Group in the Oyubari and Shumarinai areas, Hokkaido, Japan
*Reishi Takashima1, Brad S Singer2, Mark Schmitz3, Youjuan Li4, David Selby5 (1. Tohoku University, 2. Wisconsin, 3. Boise State University, 4. Chinese Academy of Sciences, 5. Durham University)
[T18-P-15]Evidence for an Early T-OAE Terrestrial System Shift and Coupled Land–Ocean Responses to Carbon Cycle Perturbation in the Northwestern Panthalassa
*Kohsuke Kawabata1, Ryosuke Saito2 (1. Kyushu Univ., 2. YAMAGUCHI Univ.)
[T18-P-16]Upper Triassic radiolarian and conodont biostratigraphy in the Inuyama area, Mino Belt, central Japan.
*Moriyoshi TAKEMUA1, Atsushi OSHIMA1, Mizuki MURAKAMI1, Tetsuji ONOUE1 (1. Kyushu Univ.)
[T18-P-17]Conodont biostratigraphy and depositional environmental changes recorded in the Carnian (Upper Triassic) Kamura Limestone, Takachiho, Miyazaki Prefecture, Japan
*Naoki Beppu1, Kosei Hisatsune1, Kento Motomura1, Tetsuji Onoue1 (1. Kyushu Univ.)
[T18-P-18]Conodont biostratigraphy of the Middle Triassic bedded chert in the North Kitakami belt, Akka area, Iwate Prefecture
*Takuma SHIOHARA1, Shun MUTO2, Tetsuji ONOUE3 (1. Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University, 2. Geological Survey of Japan, AIST, 3. Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University)
[T18-P-19]A Study of Black Sparry Calcite from the Akiyoshidai, Mine City, Yamaguchi Prefecture, Japan
*Takumi IHARA1, Ryosuke SAITO1 (1. Yamaguchi University)
[T18-P-20]Paleozoic seawater Os isotope record reconstructed from umbers in accretionary complexes of eastern Australia
*Tomu SAKAI1, Koichiro FUJINAGA2,1, Moei YANO2,1, Kazutaka YASUKAWA1, Yoichi USUI3, Keishiro AZAMI4,2, Yamato SONODA1, Jonathan C. Aitchison5, Kentaro NAKAMURA1,2, Yasuhiro KATO1,2 (1. Univ. Tokyo, 2. CIT, 3. Kanazawa Univ., 4. Tohoku Univ., 5. Univ. Queensland)
[T18-P-21]X-ray CT Reveals the Internal Anatomy of the Cambrian Microarthropod Oelandocaris oelandica
*Ayari YANAGIHARA1, Gengo TANAKA1, Itaru MITSUKAWA2, Akira MIYAKE3, Shintaro TOKUDA3, Masato HOSHINO4 (1. Kumamoto Univ., 2. Tokyo Univ., 3. Kyoto Univ., 4. Japan Synchrotron Radiation Research Institute)