Sedimentary rock

Facts

 * Sedimentary rocks are formed because of the pressure as particles of sediment are deposited out of water as it flows carrying the particles in suspension.
 * As sediment deposition builds up, the pressure squeezes the sediment into layered solids.
 * This process is known as lithification.
 * The term diagenesis is used to describe all the chemical and physical changes.
 * Sedimentary rocks are laid down in layers called strata. This process is known as stratification.