In my opinion yes ultimately all rocks are derived from igneous rocks, but we have to keep in mind that rocks are always in movement. With reference to the rock cycle this could be explained better. The Rock Cycle was probably the first of Earth's cycles or systems to be recognized and studied, at least in a qualitative sense and it is made up of three rocks, igneous, sedimentary and metaphoric.
Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change into metamorphic rock or into igneous rock. …
