The rock cycle is a process in which rocks are continuously changed between the three rock types (created in a volcano), (coming from material that sinks in liquid) and metamorphic. ... If the (materials that sink in liquids) are buried under further layers of (material that sinks in liquid), they can become lithified to produce a (coming from material that sinks in liquid) rock. Very hot liquid rock inside the Earth is produced when rocks are melted.
The rock cycle is a basic concept in geology that describes transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous. Each rock type is altered when it is forced out of its equilibrium conditions.
