Strange rock or possile fossil

Greylock

Bronze Member
Jun 10, 2012
1,229
876
Western MA
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Garrett at pro
Primary Interest:
All Treasure Hunting
I really have no idea about these things but I was out metal detecting and went down to a brook to cool off and noticed this rock. Any ideas?


image-2911418514.jpg
 

Looks like a fossil impression to me.
What state are you in?
 

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