I assume that the river violation is what you are referring as geologically incorrect.... let's hope RobA don't see it
Your mountains look good imo for the map itself.. it at least meshes well with the style of the map... but mountains are difficult... I finally got some that turned out decent using just the layer effects on my Khossus map http://www.cartographersguild.com/showthread.php?t=2399 if you like those, i believe I have the style saved so you can reproduce it...
Great stuff so far... tutorials are paying off for you bigtime