Igneous, sedimentary, and metamorphic rocks are the three types of rock.
When molten rock (magma or lava) cools and hardens, igneous rocks form. Sedimentary rocks form as particles settle out of water or air, or when minerals precipitate out of water. They build up in layers. Existing rocks undergo metamorphism as a result of heat, pressure, or reactive fluids like as hot, mineral-laden water. The most prevalent elements in the Earth's crust are silicon and oxygen, which make up the majority of rocks.
