what makes up the asthenosphere
Asthenosphere. Introduction. The asthenosphere is the layer of the Earth that lies below the lithosphere. It is a layer of solid rock that has so much pressure and heat the rocks can flow like a liquid.The rocks are less dense than the rocks in the lithosphere.he rocks in the upper mantle can be part of the lithosphere or the asthenosphere. Lithosphere rocks are solid and rigid. Rocks below the lithosphere flow and break apart. They also rise through the lithosphere in areas where tectonic plates are separating.