the formation of metamorphic rock is a sequential process, with stages of rock being compacted, heated, recrystallized
metamorphic_rock is rock. metamorphic_rock is not stone. amphibolite is not metamorphic_rock. slate is metamorphic_rock. marble is metamorphic_rock. metamorphic_rock is not rock. gneiss is not metamorphic_rock. gneiss is metamorphic_rock. metamorphic_rock is stone. amphibolite is metamorphic_rock.