what distinguish igneous sedimentary metamorphic
Igneous rocks are created from the cooling and hardening of magma. Metamorphic rocks are formed by existing rocks being subjected to heat or pressure. Sedimentary rocks are formed by the breaking up of other rocks into small particles, and then being deposited and later lithifying (hardening into rocks).gneous rocks are created from the cooling and hardening of magma. Metamorphic rocks are formed by existing rocks being subjected to heat or pressure. Sedimentary rocks are formed by the breaking up of other rocks into small particles, and then being deposited and later lithifying (hardening into rocks).