Which layer lies below the asthenosphere?

The layer that lies below the asthenosphere is the mesosphere. The asthenosphere is a semi-fluid layer of the upper mantle located beneath the lithosphere. It is characterized by its ability to flow slowly over time, which allows tectonic plates in the lithosphere to move.

Directly below the asthenosphere is the mesosphere, which is part of the mantle. The mesosphere is more rigid compared to the asthenosphere due to increased pressures at greater depths. The distinction between these two layers is important in understanding mantle dynamics and the processes involved in plate tectonics.

The crust, lithosphere, and core are positioned differently in relation to the asthenosphere. The crust is the uppermost layer where we find continents and ocean floors, and the lithosphere consists of the crust and the uppermost part of the mantle above the asthenosphere. The core, which is composed of the outer and inner layers of the Earth, lies much deeper than the asthenosphere and is not the immediate layer beneath it.