Opinion needed

[Muddy Feet]

Found this on the banks of the Mississippi. Could it be Native American pottery or is it something else?

 

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[TripleCreek]

Muddy Feet,

It is a different color then what we find here in Maryland, which range from light to dark brown. It is thinner then our average pottery, but I would say it is definetlly prehistoric pottery. Also, it should have some evidence of particales of "temper" along the broken edges. Possibly crushed quarts, or oyoster shell, or other.