The moon is made up of the crust, the mantle and the core. The crust of the Moon is predominantly made up of anorthositic rocks. It contains oxygen, silicon, iron, magnesium, calcium and aluminum. Its thickness is estimated to be approximately, 50 km from the surface. Other than these elements, the Moon's crust also features traces of hydrogen, potassium, titanium, uranium and thorium. As we go deeper, we come across the mantle of the Moon. This layer is made up of minerals such as, olivine and orthopyroxene.