The top photo is the bottom and the other is the top (I assume). The bottom is mostly flat except for an indentation that is centered and matches to the circular center of the top. It was found in a creek bed in an area where lots of other small fossils are. I'm thinking this isn't a fossil, but some sort of rock formation from drips...??? I like it because it just looks odd, but would also like to know what it is. I do have other photos, if needed. Thank you.