Discuss about the chemical composition of various types of lava rocks and magma. how is their chemical make-up related to their era and geographic origin?

Earth has a layered structure that consists of the inner core, outer core, mantle, and crust. ... When magma flows or erupts onto Earth's surface, it is called lava. Like solid rock, magma is a mixture of minerals. It also contains small amounts of dissolved gases such as water vapor, carbon dioxide, and sulfur.