Crust

The Earth's crust is a chemically distinct layer from the mantle, formed when molten rock cooled early in the planet's history. It is up to 70 kilometers thick, with the continental crust mainly composed of granite and the oceanic crust of basalt.

What is the relationship between the Earth's crust and the mantle?

What is the significance of the Earth's crust in the context of the inner solar system?