Abstract

The Seram segment of the Banda Arc appears to conform to the structure of a ‘typical’ arc, but the geology of the area reveals a number of deviations from the norm; these are briefly listed. The late Tertiary or Quaternary volcanoes forming the Uliasser Islands mark the southern margin of an extensional zone, and have been intruded along a localized transform fault. Intermediate magmas are not solely associated with active subduction, and the interpretation of the geology of the Seram area is greatly simplified if the Uliasser volcanics are not regarded as subduction-related.

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