"Bukit Amasing (Amasing Hill) is the largest and NW-most of a group of three small andesitic volcanoes of Holocene age (Yasin, 1980). They are located along a NW-SE line on central Bacan Island, west of the southern tip of Halmahera. Two smaller volcanoes, Cakasuanggi and Dua Saudara, were constructed to the SE, north of the metamorphic complex of the Sibela Mountains. These mountains separate the Amasing volcano group from another group of three andesitic Holocene volcanoes in SE-most Bacan Island."  -Smithsonian Volcano Archive
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