How do igneous and metamorphic rocks become sedimentary rocks?
The igneous and metamorphic rock is weathered (broken into smaller pieces by physical and chemical weathering processes) and eroded (movement of particles by wind, water, ice, and gravity). The sediment particles created by these processes eventually reach a point of deposition where they become stationary long enough to be covered by additional sediments. They then become compacted from the weight of additional sediments above them. As they are compacted, cementing minerals form out of the remaining fluids between the sediment particles, gluing the particles together. At this point, the material has become sedimentary rock.
