Igneous rocks come from melted rock material, or magma, that lies beneath Earth's surface.
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Igneous Rocks: National Geographic Igneous rocks are one of three main types of rocks (along with sedimentary and metamorphic), and they include both intrusive and extrusive rocks.Igneous Rock Facts
Enjoy our igneous rock facts for kids. Find interesting information and a range of examples that help explain what igneous rocks are and what makes them different from other kinds of rocks.
Metamorphic rocks start as one type of rock and—with pressure, heat, and time—gradually change into a new type of rock.
Metamorphic Rocks: National Geographic Metamorphic rocks start as one type of rock and—with pressure, heat, and time—gradually change into a new type of rock.Metamorphic Rocks For KidsRocks are made up of one or more minerals. Although different rocks can contain the same minerals, they are sorted into different types of rocks depending on how they were formed.
Sedimentary rocks are formed from broken down bits of other rocks or even from the remains of plants or animals. The little pieces collect in low-lying areas by lakes, oceans, and deserts. They are then compressed back into rock by the weight of the materials around them and on top of them.
Sedimentary rocks are formed by sediment that is deposited over time, usually as layers at the bottom of lakes and oceans.
Sedimentary rocks are rocks formed from sediment.
There are three different types of sedimentary rocks.