The outer core is a layer of the Earth's interior located beneath the mantle and above the inner core. It is composed mainly of liquid iron and nickel, which creates a dynamic environment. This movement of molten metal generates the Earth's magnetic field through a process known as the geodynamo. The outer core is approximately 2,200 kilometers (1,367 miles) thick and extends from about 2,900 kilometers (1,802 miles) to 5,150 kilometers (3,200 miles) below the Earth's surface. The high temperatures in this layer range from 4,000 to 6,000 degrees Celsius (7,232 to 10,832 degrees Fahrenheit), contributing to the fluid nature of the outer core.