The 132nd Annual Meeting of the Geological Society of Japan
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Session OralG. General Session

[1oral401-09]G. ジェネラルサブセッション第四紀9

Sun. Sep 14, 2025 9:30 AM - 12:00 PM JST
Sun. Sep 14, 2025 12:30 AM - 3:00 AM UTC
oral room 4(E203)
Chiar:Masami WATANABE(Archaeological Research Consultant, Inc.), ATSUSHI URABE(NHDR, Niigata University), Yasuhiro TAKASHIMIZU(Faculty of Education, Niigata University)
9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[G-O-11]Automatic analysis of pyroxenes and iron oxide minerals by SEM-EDX and its application to forensic discrimination of sand samples

*Ritsuko Sugita1 (1. NRIPS)
9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)

[G-O-12]Reconstructing past flood history from ostracod assemblages–An example of the 2020 Kyushu floods–

*Gengo TANAKA1 (1. Kumamoto University)
10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[G-O-13]The recovery status of the springs that dried up after the Kumamoto earthquake in 2016: A case study of the springs at the southern area of the central volcanic cone of the Aso caldera.

*Shigeaki Yamada1, Satoru Kishi2, Takeshi Terada3, Toru Ryu3, Tooru Sato2 (1. Ministry of Agriculture, Forestry and Fisheries, Hokuriku Regional Agricultural Administration Office:formerly of Kyushu Regional Agricultural Administration Office, 2. Formerly of Ministry of Agriculture, Forestry and Fisheries, Kyushu Regional Agricultural Administration Office, 3. Ministry of Agriculture, Forestry and Fisheries)
10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[G-O-14]The carbon flux changes over the past 100 years by the analysis of clastic varve sediments in the Lake Mokoto, Hokkaido, Japan.

*Koji Seto1, Kota Katsuki1, akeshi Sonoda2, Takuto Ando3, Yasuhide Nakamura1 (1. EsReC, Shimane University, 2. Tokyo University of Agriculture. , 3. Akita University)
10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[G-O-15]The Paleovegetation Changes at Iwafushi archaeological site located on the mountain side slope of Mt. Daisen, Tottori Pref., Western Japan.

*Masami WATANABE1,2, Naoko MATSUMOTO3, Shinji SUGIYAMA4, Ryota OKUNAKA1, Hidetaka BESSHO5 (1. Archaeological Research Consultant, Inc., 2. EsReC. Shimane Univ., 3. Okayama Univ., 4. Paleoenvironment Research Center Co., Ltd., 5. Nara National Research Institute for Cultural Properties)
10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[1oral401-09-6add]Break

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[G-O-16]Late Miocene to Early Pleistocene Kuroshio Current changes near the central Ryukyu Arc based on planktonic foraminiferal assemblages from the Shimajiri Group and the Chinen Formation

Yusuke Nagama4, Jun Arimoto2, Naohisa Nishida3, *Kazuhiko Fujita1 (1. Faculty of Science, University of the Ryukyus, 2. Institute of Geology & Geoinformation, AIST, 3. Tokyo Gakugei University, 4. Graduate School of Science and Engineering, University of the Ryukyus)
11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)entryECS

[G-O-17]Proposal of depositional environmental indicators and reconstruction of depositional depth for the Chinen Formation using large benthic foraminifera

*Erina HIBI1, Kazuhiko FUJITA1 (1. University of the Ryukyus Graduate School of Science and Engineering)
11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[G-O-18]Event deposits in the Idagawaura coastal lowland, Odaka, Minamisoma City, Fukushima, Japan.

*ATSUSHI URABE1, YASUHIRO TAKASHIMIZU2, KOMOMO TAGUCHI3 (1. NHDR, Niigata University, 2. Faculty of Education, Niigata University, 3. Graduate School of Science and Technology, Niigata University)
11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[G-O-19]Paleoenvironmental transitions and paleotsunami history of alluvial deposits in the Ebisawa area, Joban Coast, Japan

*Yasuhiro Takashimizu1, Riku Kawasaki3, Atsushi Urabe2 (1. Faculty of Education, Niigata University, 2. Research Institute for Natural Hazards and Disaster Recovery, Niigata University, 3. TOMATO BANK, LTD.)
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