Igneous rocks are not made up of *other rocks* in the way you might think. Here's a breakdown:

* Igneous rocks form from the cooling and solidification of molten rock. This molten rock can be magma (underground) or lava (above ground).

* The process of cooling and solidifying causes minerals to crystallize. These minerals are the building blocks of igneous rocks.

* While igneous rocks may contain fragments of other rocks (called xenoliths), these are inclusions, not the primary constituents.

So, igneous rocks are made up of minerals that crystallize from molten rock, not other pre-existing rocks.