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Halmahera
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==Geology== [[File:Halmahera Topography.png|thumb|left|upright|Topography of Halmahera]] The volcanic island lies on an [[island arc]] that includes the [[Raja Ampat Islands]], all uplifted by the northward migration of the [[Australia (continent)|continent of Australia]] and subduction of the [[Pacific Plate]]. [[Dukono]] is an active volcano at the north end of the island. [[Mount Ibu]] is an active volcano on the island's northwest coast. [[Ultramafic]] rocks and [[ophiolites]] form the bedrock over large areas of the eastern peninsula.<ref>https://volcano.oregonstate.edu/dukono Dukono|Volcano World|Oregon State University</ref>
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