GnomesOfFury
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My dad dug this up near a river in Grand Rapids, MI around 40 years ago.
We are both into collecting fossils, but neither of us could identify what this could be.
An anchor? Some sort of vertebrae? An odd form of trilobite?
Edit: thank you to all who commented and tried to help out! Turns out this is a fossil of a Cucullaea Gigantea - a 50 million year old mollusk. Not too uncommon but more interesting than a rock for sure!
Harryteeters
It's not just a rock. I pulled a few from a river in Maryland when I was a kid. My dad remembers the name. I'll get back to you soon!
boatsandhoes93
Well that's your typical dino choad
ABigOTubOfGrease
Something that i would probably bash someone’s head with
MaxximumB
Is it a baculum?
GnomesOfFury
Doesn’t appear to be one. And it’s much too heavy. Unless it belonged to something very large?
MaxximumB
Well, at least one 'part' was large. ;)
Timtimgrimslimjim
I can tell you that's not a trilobite.
GnomesOfFury
That is why I doubted it when my dad told me that. Though there are lots of different types, so I wasn’t sure if there was a type like this.
JoetheGeologist
Fun fact: The white stuff on it is probably original shell material since most Cretaceous clams aren't remineralized like bone or wood is
Harryteeters
I got it! "Cucuella Ginanta." Its the fossilized inside of a bivalve mollusk. 65 million years old
Harryteeters
My pops just said "clam" so I had to do some research. During my Googling, I saw that the small ones are selling for $25.
GnomesOfFury
I also found “Protocardia Texana” as a match for this as well. Either way, i guess it’s somewhere between 50 to 150 million years old!
Harryteeters
Yaaaay, solved a 15 year old mystery!
positronic
Is it a coprolite?
GnomesOfFury
Too symmetrical to be coprolite, I think.
positronic
Well there goes any potential for poop jokes.