Help identifying rocks

[eabow]

Hello,
I have been looking for answers as to what kind of rocks these are. I got them in the mid eighties on my uncle's property in Tennessee. Can anyone tell me what they are please? I've attached two photos. Thanks!

 

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[Kray Gelder]

They look like ironstone concretions.

 

[vpnavy]

I noticed this was your very first post - so, Welcome Aboard eabow!