Which mechanism causes an increase in coastal mountain elevation as a continental plate overrides a subducting oceanic plate?

💡 Explanation

When a continental plate overrides a subducting oceanic plate along a convergent boundary, crustal thickening via ductile deformation occurs because compression accumulates and progressively shortens the vertical continental crust section. Therefore, elevation increases due to thickening, rather than glacial melting, thermal expansion, or river deposits, which do not account for shortening stress field associated with subduction.

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