火山列島,南硫黄火山の地質
Geology of Minami-Iwo Volcano, Izu-Bonnin Islands, Japan

福山 博
1983 Journal of Geography (Chigaku Zasshi)  
Minami-Iwo volcano is located at the southern end of Izu -Bonnin volcanic chain , 1300km south of Tokyo. It consists of three major volcanic edifices; older volcano I (OV1) , older volcano II (OV2), and younger volcano (YV) . At the boundaries between OV1 and OV2 and OV2 and YV, pyroclastic materials are characteristically observed; s coria fall deposit
doi:10.5026/jgeography.92.55 fatcat:zl7nx7rdqbfdlgftsgp5bo4qca