Below the lithosphere is the asthenosphere layer, a much hotter and malleable portion of the upper mantle. The asthenosphere begins at the bottom of the lithosphere and extendsapproximately 700 km into the Earth.
it is Below the lithosphere is the asthenosphere layer and a hotter and malleable portion of the lithosphere and the asthenosphere that starts at the rear end of the lithosphere and extends circular about 700 km into the Earth.
