The rock cycle illustrates the formation, alteration, destruction, and reformation of earth materials, and typically over long periods of geologic time. The rock cycle portrays the collective system of processes, and the resulting products that form, at or below the earth surface.The illustration below illustrates the rock cycle with the common names of rocks, minerals, and sediments associated with each group of earth materials: sediments, sedimentary rocks, metamorphic rocks, and igneous rocks. On a grand scale, the rock cycle is integral to the processes associated with plate tectonics.
Rock Cycle Illustrated by Phil Stoffer. Republished with permission. http://geologycafe.com/erosion/rock_cycle.html

