The upper mantle is a hot area of earths interior that is less dense than the lower mantle. It goes from 250 kilometers to 600 kilometers or150 miles to 400 miles. Its composition is Silicon Oxygen Iron and Magnesium. It is a liquid.
magma can be classified into two,magma of granitic composition(originates from lower continental crust) and magma of basaltic composition (which originates from upper mantle).Both can form intrusive rocks.