GeologyRocks

The layer beneath the crust, but above the core in the interior of the Earth. It's composition is broadly that of ultrabasic rocks.

In the mantle, temperatures range between 500°C-900°C at the upper boundary with the crust to over 4,000°C at the boundary with the core. Although the higher temperatures far exceed the melting points of the mantle rocks at the surface (about 1200°C for representative peridotite), the mantle is almost exclusively solid. The enormous lithostatic pressure exerted on the mantle prevents melting, because the temperature at which melting begins (the solidus) increases with pressure.