The Breadth of an Arc- Trench Gap at a Subduction

question 29

Multiple Choice

The breadth of an arc- trench gap at a subduction zone is determined by:

• A) the angle at which the subducting plate descends.
• B) the width of the volcanic arc.
• C) the amount of material in the accretionary wedge.
• D) the amount of material eroded from the adjacent continent and volcanic arc.

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