寄書
伊豆諸島，利島火山の新期活動の年代：14C年代値と地形判読を基に
2020 年 65 巻 3 号 p. 83-87
詳細
2020 年 65 巻 3 号 p. 83-87
The activity of Toshima Volcano, Izu Islands in Japan, is divided into two stages: younger (the lava flows of parasitic craters) and older (the main stratovolcano) stages. The 14C age of “Kajiana” crater lava, the earliest lava of the younger stage, was approximately 11 ka (cal BP). Based on the results of radiocarbon dating and topographic analysis, we conclude that all three magmatic eruptions of the younger stage of Toshima Volcano occurred during the Holocene.
