I had a look at the map descriptions, and liked what I saw. Good job, I like to have that sort of info to fill the picture.
Something is blatantly wrong with Caustic Valley.
Looking at the ambient temperature listed it reads at 85 degrees celcius.
There are pine trees on the map...........

I would suggest removing them and replacing with a form of imaginary microbe growth. It just does not "feel" as hot as it should. This is hard for me to convey, and I hope you can see where I am coming from.
Terraforming or not, trees will not survive 85 deg C.
Hope this makes sense, and keep up the great work.

EDIT: Fires are something that pass. (Just for those that want to cite trees surviving fire)
Edited by Dirk Le Daring, 10 November 2012 - 03:57 PM.