Which statement is the best description of what happens in the rock cycle?
Choices: +Rocks on old mountains are gradually weathered away while mountain building and volcanism form new mountains. +Once formed, rocks stay in place until rocks above them are weathered away, and they reach the surface. +As sedimentary rocks are buried deep below other rocks, they are changed by heat and pressure, eventually return to the surface, and are weathered again. +Younger sedimentary rocks are always deposited on top of older metamorphic or igneous rocks.
