P3+-+Earth's+Mantle

Although the mantle is largely hidden from our view, we do see it in places where cracks open up, allowing the molten rock to escape. These are __ Volcanos, __ of course, and the liquid rock we see pouring out is the same as you’d find in the mantle. The Earth's mantle can be located between the crust and the outer core. The Earth’s mantle is mostly composed of silicate rocks that are rich in iron and magnesium. Although it’s mostly solid, it’s hot enough that it can flow over long timescales. The upper mantle flows more easily than the lower mantle because of the increasing [|temperature] and pressures as you descend into the Earth.