Help identifying!

[BigDadddy]

Found this in North Mississippi. In red clay. Found 20 or 30 smaller ones without the detail , they have been rounded off. They were all within a 15 ft radius. Been digging rocks and arrowheads here my whole life and never ran across this. Thinking it could be Coprolite (fossilized feces)??

 

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[pepperj]

Could very well be, very interesting find.