Old foundation rock?

[omegared31]

I found this chunk of rock about 12 inches down and when I rub it its like rubbing a piece of chalk. I know that back in the 1850's there was a school on the property that I found this on so I was just wondering if it was possibly part of the foundation.

 

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[omegared31]

Lol

 

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[Backwoodsbob]

Hey rock which are you referring to. I can probably show you a few things about rocks you didn't know about

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