Rocks can be found almost everywhere! The're really cool! I'll tell you how they are formed! First i'll start with igneous! Igneous is formed by molten lava cooling and becoming solid!
Metamorphic rocks are formed by an igneous rock melting into a new rock called a metamorphic rock!
Sedimentary rocks are formed when despostied from air wind water or gravity flows over and it will carry it into suspension. So it is formed because and erosion