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Geography

Which outcome occurs at a subduction zone with shallow slab angle?

A)Widespread back-arc basin formation
B)Increased continental arc volcanism
C)Formation of narrow, deep trenches
D)Decreased frequency of megathrust earthquakes

💡 Explanation

Shallow slab angles cause broad compressional forces, which, through isostatic compensation, create back-arc basins rather than focused volcanism because the subducting slab interacts over longer horizontal distances. Therefore back-arc basins form; rather than localized faulting or volcanism dominating.

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