It's a shame the botany doesn't make much sense. Part of me wishes that either:
a) The trees/shrubs look like the same plant you get from logging/harvesting, or
b) They'd just used new, exciting Eorzean names for plants (ie like Rolanberry) instead of "Oak", "Ash", etc.

Anyway, in relevance to the OP, do you think that the geology has been designed to make much sense, considering this? Or is it just going to be that higher tier rock and metal is going to be in the higher level zones?