2.3 硫黄島の地質
1985 年 94 巻 6 号 p. 436-445
詳細
1985 年 94 巻 6 号 p. 436-445
The main portion of Iwo-jima island consists of lava flows and pyroclastic rocks of trachy andesite, erupted and deposited in shallow sea, except the upper part of Suribachiyama, in 2600-2800 y.B.P. The island have been uplifting from about 800 y.B.P., followed by active faulting and change in coast lines.
