Geomancer is obviously about earth based magic
Skills: Fossil Strike which is bones with oil, Increasing your armor rating, Poison Arrow, Cloud of Spores, and a ground rupture.
I kinda already attribute oil to the ground anyway (also it's supposed to be a giant rock). I figured the armor rating increase was from rock/steel fortification and the ground rupture is obviously from the ground. Poison seems a bit out of place at first. But, since I saw the giant rock and fortification first, I kinda just attributed the poison to the earth from then on. Same with the lightning from air, and ice from water. However, I think undead when I hear necromancy, as with many others, and it currently has none of that. You also start off with all blood related spells, which made it seem a bit weird.