canyon to middle light and density masses igneous stone into metamorphic stone
igneous_rock is stone. metamorphic_rock is rock. metamorphic_rock is not stone. marlite is metamorphic_rock. igneous_rock is rock. slate is metamorphic_rock. igneous_rock is not stone. metamorphic_rock is stone. marlite is not metamorphic_rock. groundmass is igneous_rock.