Which geophysical effect occurs when a subducting oceanic plate has a rough surface with many seamounts?

💡 Explanation

When a rough subducting plate enters the subduction zone, asperities (seamounts) resist smooth sliding, increasing stress buildup because the friction increases along the fault. Therefore, increased frequency of megathrust earthquakes results, rather than decreasing melting, reduced volcanism or enhanced spreading, which require different tectonic settings.

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