Rock - Native American Tool?

[Seagulldesigns]

I found this in a dried river bad in Northeast Ohio (roughly 25 years ago) and just recently ran across it which has resparked my curiosity. I was wondering if any of you fine people could help me identify it (if it's even anything to even indentify?) Thanks in advance!

 

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[Kray Gelder]

I think it's a fossilized stromatolite colony.

 

[vpnavy]

1st - I noticed this was your very first post - so, Welcome Aboard SeagullDesigns! You didn't list your state (or country) in your profile. So, you might consider jumping over to Sub-Forums: Select Your Area.... and selecting location information (i.e., clubs, hunts, finds, legends, maps, etc.) directly related to your state (or country).

2nd - I moved from Today's Finds! over to Forum: What Is It? for more exposure.

 

[diggummup]

Looks like a piece of eroded sandstone to me.