Japan Geoscience Union Meeting 2023

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Poster

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[O-06] Poster presentations by senior high school students

Sun. May 21, 2023 1:45 PM - 3:15 PM Poster (Exhibition Hall 8, Makuhari Messe)

convener:Tatsuhiko Hara(International Institute of Seismology and Earthquake Engineering, Building Research Institute), Katsuyoshi Michibayashi(Department of Earth and Planetary Sciences, Nagoya University), Miwa Kuri(Japan Meteorological Agency), Keiko Konya(Japan Agency for Marine-Earth Science and Technology)

On-site poster schedule (2023/5/21 13:45-15:15)

1:45 PM - 3:15 PM

[O06-P25] Estimation of the crater of a submarine volcano in Shichigahama from near Katsurashima Island, Shiogama City

*Ayane Hatayama1, *Riku Aiba1, *Takeru Murakami1 (1. Miyagi Prefectural Tagajo HighSchool)

Keywords:volcano, underwater volcanic, intrusive rock


The dacitic volcanic breccia Otb is distributed in the Otsuka Formation from Uradogatsurajima to Funairishima in Shichigahama Town and Shiogama City. Although previous studies have described it as an 'underwater pyroclastic sediment,' this study assumes it as an 'intrusive rock' based on lithological descriptions, and aims to estimate the rough location of the old crater by tracing its distribution from Katsura Island to Funairi Island. At present, we attempt to infer that Otb, a dacitic volcanic breccia in the Otsuka Formation, is an intrusive rock. After verifying that it is an intrusive rock, we would like to discuss where the underwater volcanic crater that once existed in the area and resulted in the dacitic breccia Otb existed.