* Igneous rocks: Like granite, basalt, and rhyolite.
* Sedimentary rocks: Like sandstone, limestone, and shale.
* Metamorphic rocks: Like slate, schist, and gneiss.
The specific minerals that make up clay (like kaolinite, illite, and montmorillonite) are created through chemical weathering processes that break down the original minerals in these parent rocks.
So, the parent rock of clay is not a single type of rock but rather a variety of rocks that have undergone weathering and chemical alteration.
