Rocks Sedimentary, igneous and metamorphic Sedimentary • Sedimentary rocks are rocks formed by the deposition and cementation of materials from the earths surface. • Examples: Breccia, conglomerate, sandstone, shale and limestone. • They can be found in deserts, oceans and rivers. Igneous • Formed through the cooling and solidification of magma or lava. • Examples: granite, pegmatite, diorite, rhyolite and quartz. • Igneous is found deep beneath the earths surface. Metamorphic • A rock that has changed into a different rock from heat or pressure. • Examples: anthracite, quartzite, slate, marble and gneiss. • Can be found deep below the earths surface.