Ponchatrain Trail rock

[uncleedge]

Can someone help me identify this rock I found while detecting on my property located in Michigans UP? The property is on what used to be known as the Ponchatrain Trail?

 

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[mojjax]

I'm guessing it was used by Indians for fire making ?
Nice find !

 

[stud564]

it looks like an old stone spoon.