Why Do Offshore Volcanic Arcs Collide with and Suture to an Overriding

question 43

Multiple Choice

Why do offshore volcanic arcs collide with and suture to an overriding plate?

• A) They are too buoyant to subduct.
• B) The melting involved in subduction sutures them to the plate.
• C) Their predominant rock type is the same as the overriding plate.
• D) When they collide, subduction stops.

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