Grey Face: Part Four

This is the fourth set of photos. At first glance, it might seem as if the dark blue sections are places where the stone has been chipped accidentally, but when one looks through the posted photos in Parts 1-4, it becomes evident that it is more likely by design.

Also, I'm wondering if the image in Photos 18-23 (near the end of the posting) is meant to represent a mastodon or mammoth? The shape is about right. I'm not commenting on most of the images because a) I think they're often obvious and b) I don't want to influence what people see, but I just noticed this particular image when I was working on the posting and thought I'd mention it.