This is a very interesting shot and yes, I can see several faces! This is an interesting choice for the Branch Challenge. Not really sure what you were going for and without looking at the comments I'm betting you got a lower score because many felt it did not meet the challenge. Just looked at the comments and I was right. I would love to hear how you felt it meet the challenge though.
As for the picture, it does have a lot of different facets to it and with some minor adjustments in post processing you could probably really bring out those shadows and faces even better. Right now the lighting and color seems a bit flat and it all really rather blends in together.
If you decide to play with this some more I would love to see the results!
Well I would say this shot leaves me with a petrified feeling.
You managed to fill the frame here and in my honest oppinion, I believe you have filled it too much. At the same time you leave the eye wandering for a Focal point.
Do not get me wrong, your contrast on this shot is very nice along with a nice sharp focus. It really is difficult to give a very in depth critique without knowing the Camera used or the settings. With that I will say that personally I would have backed out a tad. I am wondering what is on either side of this rock. I would assume other rocks.
Is there a fossil branch in there somewhere? I'm afraid I can't see it. Lighting and texture of the rock is good but it lacks something in the composition.