Alamagan Volcano - map unit polygons

Alamagan Volcano is a Quaternary stratovolcano along the Mariana Arc, an active subduction zone in the western Pacific Ocean. Although primarily submerged, its peak...阿拉马甘火山（Alamagan Volcano）是沿马里亚纳弧（Mariana Arc）分布的第四纪层状火山（Quaternary stratovolcano），而马里亚纳弧是西太平洋的一条活动俯冲带。该火山主体大多处于水下，其峰顶……