“…The islands of Buton, Sula, Banggai, Obi and Bacan, and the submerged Banda ridges are all of such microcontinental origin (Hamilton, 1979(Hamilton, , 1986Silver and Smith, 1983;Silver et al, 1985;Pigram et al, 1985;Lee and McCabe, 1986;Katili, 1989;Hartono, 1990;Daly et al, 1991;Smith and Silver, 1991). Concerning Maluku, only Halmahera-Morotai is, at least partly, of island arc origin; the Halmahera arc evolved far to the east of its present position along a fracture in the Pacific plate to which possibly also eastern Mindanao, Waigeo island, and the Mariana, Yap, and Palau arcs are connected (Hall and Nichols, 1990;Honza, 1991).…”