what does the earths crust renew itself?

Question

i mean HOW does the earths crust renew itself

Answer 1

The earth's crust renews itself from the asthenosphere, the layer below the lithosphere. This occurs at the tectonic plate boundaries, specifically the divergent boundaries. And can grow up to 15 cm per year. There are also subduction zones where the plates approach each other and one will sink to the lower depths.