[@ShwiggityShwah] Geomancy is indeed a thing, though it is considered a "minor" school of magic. Here is my blurb on it from my worldbuilding document:

[b]Geomancy:[/b] a discipline that manipulates Ea itself, in the form of its stone, sand, soil, and magma. Practitioners can induce earthquakes, create sandstorms, or blast their enemies with rock and lava.