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← GeographyWhich geologic outcome intensifies when an oceanic plate subducts at a steeper angle beneath a continental plate?
A)Magma viscosity increases significantly
B)Trench depth amplifies rapidly
C)Volcanic arc migrates inland✓
D)Seafloor spreading rate accelerates
💡 Explanation
When the subduction angle increases, the point of magma generation shifts farther inland because the descending plate reaches the required depth for melting at a greater horizontal distance. Therefore volcanic arc migrates inland, rather than viscosity changes, trench deepening, or spreading acceleration which result from different tectonic processes.
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