What geologic process occurs when one tectonic plate moves beneath another as the plates converge?

What geologic process occurs when one tectonic plate moves beneath another as the plates converge?

• A. Erosion
• B. Weathering
• C. Uplift
• D. Subduction

Answer: (D)

Subduction occurs when two tectonic plates converge and one dives beneath the other into the mantle. The denser plate—often the oceanic plate—sinks under the less dense plate, creating a subduction zone. This process generates deep ocean trenches, powerful earthquakes, and magma from the melting slab can rise to form volcanoes on the overriding plate. Erosion and weathering are surface processes that wear away or break down rocks, not the deep sinking of a plate, and uplift refers to the vertical rise of land, not the subduction of one plate beneath another.

Subduction occurs when two tectonic plates converge and one dives beneath the other into the mantle. The denser plate—often the oceanic plate—sinks under the less dense plate, creating a subduction zone. This process generates deep ocean trenches, powerful earthquakes, and magma from the melting slab can rise to form volcanoes on the overriding plate. Erosion and weathering are surface processes that wear away or break down rocks, not the deep sinking of a plate, and uplift refers to the vertical rise of land, not the subduction of one plate beneath another.