Assertion: archipelago's island | /r/HasProperty | volcanic in origin
Facets:
value: generally
type: DEGREE
Source sentences:
text: The islands are volcanic in origin, being part of the Pacific Ring of Fire, and are mostly mountainous.
text: The islands are volcanic in origin, produced by the movement of the Nazca Plate over the Juan Fernández hotspot.
text: The larger islands are generally volcanic in origin and have mountainous terrain, while most of the smaller islands are coralline and relatively flat.
text: Volcanic in origin, the islands are part of a vast submerged mountain chain, probably a southeasterly extension of the Cook Islands (New Zealand).