Metamorphic rocks are formed when igneous or sedimentary rocks are subjected to heat, pressure and certain fluids.
(Metamorphic rocks; are formed; T:when igneous or sedimentary rocks are subjected to heat, pressure and certain fluids) (igneous or sedimentary rocks; are subjected; to heat, pressure and certain fluids)
Metamorphic rocks igneous or sedimentary rocks
are formed are subjected
T:when igneous or sedimentary rocks are subjected to heat, pressure and certain fluids
to heat, pressure and certain fluids