The Lower Mantle is a layer of the Earth's interior located beneath the Upper Mantle and above the Outer Core. It extends from about 660 kilometers (410 miles) to approximately 2,900 kilometers (1,800 miles) deep. This region is composed mainly of solid silicate minerals and experiences high pressure and temperature, which influence its physical properties. In the Lower Mantle, materials are subjected to extreme conditions, causing them to behave differently than at the surface. The temperature can reach up to 4,000 degrees Celsius (7,200 degrees Fahrenheit). This layer plays a crucial role in the Earth's geology, including processes like mantle convection, which drives plate tectonics and influences volcanic activity.