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← GeographyWhich mechanism inhibits stratovolcano formation at convergent plate boundaries with rapid subduction?
A)Rift valley development prevents buildup
B)Magma viscosity reduction limits layering
C)Lithospheric hydration suppresses melting
D)Erosion rates exceed volcanic deposition✓
💡 Explanation
When subduction is rapid, erosion occurs because the volcanic edifices are actively uplifted and exposed but volcanic deposition is slower due to limited pathways. Therefore, erosion exceeding deposition results reducing stratovolcanoes rather than rift valleys, viscosity reduction, or melting suppression which require different geological conditions.
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