Stone Type: Sedimentary
Sediments like sand, silt, and clay are produced by erosion of bedrock outcrops and accumulate in layers on land and under the oceans. The lower parts of these layered deposits become subjected to intense pressure and high temperatures. This compacts the sediments, forces out the water, and minerals such as silica precipitate into the spaces between particles. The particles are cemented together to form sedimentary rock.