Is this a Fossilized Rib Bone?

[Bigcypresshunter]

Found this in road fill dug from a rock pit in South Florida. Rock and shell dug from these pits are used to make roads. Its hard as a rock, smooth on the outside and has layers inside. Is this a fossilized rib bone or something else?

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I have no idea how that last photo got there or how to delete it.

 

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[Bigcypresshunter]

Now I lost all my photos...sorry.

 

[Bigcypresshunter]

Moderator please delete this entire thread as it posted twice when I tried to edit I dont know how to delete it.