Metamorphism is a process whereby existing rocks are transformed or metamorphosed by heat and pressure to form new rocks, stable at those new temperature and pressure conditions.
(Metamorphism; is; a process whereby existing rocks are transformed or metamorphosed by heat and pressure) (existing rocks; are transformed; L:a process) (existing rocks; metamorphosed; by heat and pressure)
Metamorphism existing rocks existing rocks
is are transformed metamorphosed
a process whereby existing rocks are transformed or metamorphosed by heat and pressure
L:a process
by heat and pressure