Chocolate-chip cookie-like pumice from the 2021 Fukutoku-Oka-no-Ba eruption: views from SNS-related geology 論文 Kenta Yoshida・Yu Maruya・Tatsu Kuwatani ·2022-01-01 ·『Japanese Magazine of Mineralogical and Petrological Sciences』 51(1) pp. n/a-n/a doi:10.2465/gkk.220412