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← GeographyWhich outcome primarily results when a continental plate overrides an oceanic plate at a subduction zone experiencing sediment starvation?
A)Reduced seismic wave reflection
B)Enhanced mantle wedge hydration
C)Increased accretionary wedge erosion✓
D)Elevated pore fluid preservation
💡 Explanation
Increased accretionary wedge erosion occurs, because sediment starvation reduces lubrication at the subduction zone. This reduction increases tectonic stress via the mechanism of basal friction. Therefore, the wedge erodes more readily rather than accreting materials where additional sediment influx would have occurred.
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