Which part of the mantle is liquid?

The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. ... The lithosphere includes both the crust and the brittle upper portion of the mantle. .... This point, called the Gutenberg discontinuity, marks the end of the mantle and the beginning of Earth's liquid outer core. read more

The mantle is roughly 1,802 miles thick and consists of four layers: the lithosphere, the asthenosphere, the upper mantle and the lower mantle. The layer closest to the surface of the Earth is the lithosphere, and the rock there is very similar to that of the crust. read more

The mantle is different. There are convection currents, which are flows in liquids, in the mantle even though it is not a liquid. Think of if you stood on cold, hard butter and it very slowly flattened. Lava is liquid rock from the mantle, not the outer liquid core, that squirts out a crack. read more