Interesting scene. It definitely brings to mind desolation. The tones are a bit flat, but the composition is nice. I think I might have preferred a slightly tighter vertical crop though.
Blah blah blah rule of thirds blah blah blah. I'm guessing you're hearing some of that this week since the image is fairly divided in half in the top & bottom. It's an interesting subject. I might have considered cropping out the rock on the bottom right -- it seems just a little too dark compared to the rest of the features.
Definately naturally, untouched by man, but it's not too greatly exciting. Sorry. It is technically well done. lighting is good, and the angle and framing/cropping are good, and your focus seems good too. It just lacks that something to make it scream 'wow' to me. Good luck in the challenge.