Question

The upper mantle called what

Answer 1

The upper mantle is often referred to as the "asthenosphere" in geological terms, particularly the region that lies beneath the lithosphere. The upper mantle extends from the base of the lithosphere down to about 410 kilometers (about 255 miles) below the Earth's surface. The asthenosphere is characterized by its semi-fluid nature, allowing for the movement of tectonic plates. The upper mantle also includes denser rocks of peridotite composition and plays a crucial role in geological processes such as mantle convection.