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Why does oceanic crust tend to sink at subduction zones?

Answer and explanation

Correct answer: It is denser

Oceanic crust is mainly basaltic and is denser than continental crust. At a convergent boundary, this greater density causes the oceanic plate to sink beneath a less dense continental plate or another oceanic plate into the mantle. Option A is incorrect because less dense crust tends to remain higher. Exam tip: link subduction with the higher density of oceanic plates.

Related tags

Oceanic CrustSubduction ZonesPlate TectonicsCrust DensityConvergent BoundariesEarth InteriorInterior Structure Of The EarthInterior Of The Earth

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