Nice, but it took too long to find the tree. The ravine is the salient feature of the image, not the tree. (At least to me...) Also, the sky looks like you cloned out a bunch of stuff and made an artificial horizon. Not that that is out of bounds for an advanced editing challenge, but it doesn't look right to me... more like some wierd fog was approaching than a true sky.
This has so much promise but the background really seems to be messed up as I look at it closer. I'd say the cloning tool was not as precise as it could have been. Good luck!
Nice feeling to this one. If you ever watched the movie Land Before Time, this image reminds me of when the earth began to split and divided the dinos from their herds. Very nice mood.
Maybe I'm wrong, and forgive if I am, but it looks like you erased things out of the sky or the horizon. It's really distracting. Maybe it was just really heavy fog, but I have my doubts about that. It's a pretty picture, I just wish it hadn't been so heavily retouched.