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← GeographyWhich outcome occurs when elevated pore fluid pressure inhibits subduction?
A)Increased seismic moment release
B)Formation of a deep-sea trench
C)Shallower subduction zone angle✓
D)Enhanced mantle wedge melting
💡 Explanation
Shallower subduction occurs because elevated pore fluid pressure reduces the effective stress and frictional resistance along the subduction interface, hindering deeper descent and pushing the angle upwards. Therefore a shallower angle results, rather than increased seismic potential under locked zones.
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