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Why does mantle rock begin to sink back towards the lower mantle from the area closest to the crust?

(Science/Plate Tectonic Movement)

User Nbeyer
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1 Answer

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21 votes

Answer: Convection Currents

Step-by-step explanation: The mantle rock is solid and denser because it is cooler. This means it will sink closer to lower mantle as warmer, lense dense rock/magma moves upwards.

User Ermenegildo
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