Rock cycle?

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. The Rock Cycle is a group of changes. The rock cycle is a basic concept in geology that describes transitions through geologic time among the three main rock types: sedimentary, metamorphic, and. The rock cycle is a series of processes that create and transform the types of rocks in Earth's crust. The rock cycle is a concept used to explain how the three basic rock types are related and how Earth processes, over geologic time, change a rock from one type into another. The rock cycle is an illustration that is used to explain how the three rock types are related to each other and how Earth processes change a rock from one type.