What Proves The Existence Of The Boundary Between The Crust And Mantle?

What proves the existence of the boundary between the crust and mantle?

 

What proves the existence of the boundary between the crust and the mantle?

Answer: As seismic waves pass from the crust to the mantle, the velocity increases. If the velocity of waves changes, it means that the density of the media where they travel through are different, and thus proves a boundary.


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