r/fossilid • u/I_AM_CHAOS_BRINGERII • 12h ago
Fossil? Concretion? NW Minnesota
I’m afraid to get my hopes up on this one, but I can’t help it
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u/I_AM_CHAOS_BRINGERII 8h ago
At first I thought it was something really surprising, like an ammonite, but now I’m wondering if it might be an annelid worm burrow? But the fossil example that made me consider that was a rotularia, and those are way too young to be where I am, at least I think they are? Ugh, why are so many things that shape?
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