Nice terrain Slodder!
One thing that could be done with the ground is to add some variation in there. Anything. Some different coloured spots, natural debris (for me the most difficult thing!), rocks, pieces of vegetation...
I´m not a geologist either but I dare to claim that you just can´t find a generic-looking terrain ANYWHERE in the nature...or if you do, you´re not looking close enough...
It looks really good as it is, with a little "something" it would be even better!
Keep it up,
Toni