If a Back-Arc Basin Is a Region Related to a Subduction

question 29

Multiple Choice

If a back-arc basin is a region related to a subduction zone, how can such an extensional basin form near a boundary defined by compression?

• A)Trench rolls back as the old, dense subducting plate sinks.
• B)Compression ceases before extension takes over.
• C)Rising magma is softening the crust, allowing it to stretch.
• D)A plate subducting at an extremely shallow angle is pushing against the back-arc region.

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The cognitive tendency in young children to focus on one aspect of a situation while neglecting others, often observed in preoperational stage of Piaget's theory of cognitive development.

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