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Showing results for tags 'back fill?'.
Good morning folks. I have a strange fossil that "looks" like it might be a devil's toenail or ???? It is filled with what looks like ocean debris. It looks like a shell, but has way too many layers. It also looks like some sort of coral or stromatolite. It came from a box of rocks purchased at a yard sale so there isn't any ID information. Anyone know what this really is?