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Homework Help: Geology Subduction Zones question based of picture

  1. Sep 12, 2011 #1
    1. The problem statement, all variables and given/known data

    (Picture is attached)

    a. Based on island arc-trench geometry in Fig 2.17, what factors determine the width of the arc-trench gap, and explain your answer?

    2. Relevant equations


    3. The attempt at a solution

    1. I think it is the subducting plate and the melting that occurs above the plate that determines the width of the gap, and that the accretionary wedge and the fore-arc basin are just part of the gap. However I honestly don't know and would really like help!

    Attached Files:

  2. jcsd
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