What is the region of the earth's interior between the crust and the core?

The region of the Earth's interior between the crust and the core is known as the mantle. It extends from the base of the crust down to the outer core, reaching depths of about 2,900 kilometers (1,800 miles). The mantle is composed of solid rock that behaves plastically over long periods, allowing for convection currents that drive plate tectonics. This layer plays a crucial role in the Earth's geological processes and heat transfer.