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   It's been a while since I've been here, glad to be back though!

.  I found this intriguing stone when I was looking for agates in some exposed glacial sediment layers near a large lake in Autumn, 2020. It's circular, It has a pretty uniform edge around its circumference. There is also a large circle formed or carved in its center on one side.


I have no idea what it could be but in my completely unprofessional opinion it appears manipulated in some way. Any insight is greatly appreciated!   :)






I also occasionally find coleraine formation nodules in this area if that helps 

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It's a concretion. Similar ones are known from the Alaskan peninsula if I remember correctly.

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+1 for Concretion. 

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