Context: Metamorphic rock is formed when sedimentary or igneous rock is exposed to high heat and pressure, thus transforming the rock.
(Metamorphic rock; is formed; T:when sedimentary or igneous rock is exposed to high heat and pressure, thus transforming the rock) (sedimentary or igneous rock; is exposed; to high heat and pressure)
Metamorphic rock sedimentary or igneous rock
is formed is exposed
T:when sedimentary or igneous rock is exposed to high heat and pressure, thus transforming the rock
to high heat and pressure