Going through my pictures again I've spotted 2 areas of interest in this picture;
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I apologise for not making this a clickable link.
I've circled the two area's of interest. The first and largest is the a large dark area. Taking into account the general area this circled anomaly stands out like a sore thumb. Why is it so dark? It can't possibly be a shadow as other rocks with the same orientation are not showing this sort of shading. There is a small brighter spot within the shading but with the software I have I can't really bring it out to show much at all. Conversely on the right is my second area of interest. This is much much smaller and stands out again. Comparing it to the surrounding geology it seems totally out of place. It seems quite circular too, this could be an optical illusion because of the angle the picture was taken at.
for some reason photobucket seems to be cropping this image below, which is making the second area of interest disappear. Hopefully the link below will take you to the proper image
