Mesosphere

The mesosphere is another layer of the Earth and helps make up the asthenosphere. The rock in the mesosphere is highly compressed together. The pressure in the mesosphere is so great that even though the rock is hot, it is solid and considerably rougher than the rock on top of it. The mesosphere is also known as the mantle. The majority of the mass of the mantle is the mesosphere. At this depth in the Earth the layers start to get denser. The denseness comes from a change in crystal structuresof abundant minerals in the rock.