Question

What layer is lower mantle

Answer 1

The lower mantle is a layer of the Earth's interior situated beneath the upper mantle and above the outer core. It extends from a depth of about 660 kilometers (410 miles) down to approximately 2,900 kilometers (1,800 miles). The lower mantle is characterized by high temperatures and pressures, and it is composed primarily of silicate minerals that are rich in iron and magnesium. This layer plays a critical role in the dynamics of the Earth's interior, including mantle convection and plate tectonics.