With additional heat and pressure, sedimentary rocks can become metamorphic rocks, and metamorphic rocks could melt completely to become igneous rocks.
(sedimentary rocks; can become; metamorphic rocks) (metamorphic rocks; could melt; completely; to become igneous rocks) (metamorphic rocks; to become; igneous rocks)
sedimentary rocks metamorphic rocks metamorphic rocks
can become could melt to become
metamorphic rocks
completely to become igneous rocks
igneous rocks