1. It manifests the collision of a continent and an intra-oceanic island arc . 2. They consist of a series of island arc called the Insular Islands. 3. "' Ruang "'is the southernmost stratovolcano in the Sangihe Islands arc . 4. Characteristic of subduction zones, andesite represents the dominant rock type in island arcs . 5. Behind this island arc was a new ocean, the Ural Ocean. 6. These sediments accumulate within the basins on either side of an island arc . 7. One type of volcanic oceanic island is found in a volcanic island arc . 8. "It's the infusion of all that granite that turns island arcs into continental crust," 9. By the Late Ordovician, this island arc had collided with the North American continent. 10. First collisions are between continents and island arcs , but lead ultimately to continent-continent collisions.
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