Unknown Central florida fossil, please help?

[blueracer]

I am not sure about this one, not even a guess. It is from central florida, in the lake whales ridge area, it is slightly curved, cylindrical, and appears to have a hole through the middle. it is layered as you can see in the fractured areas. Any ideas? sorry about the fingernails.

 

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[GatorBoy]

Looks like a fossil left by a tube worm.

 

[GatorBoy]

 

[Harry Pristis]

Not a tube work shell . . . the walls are too thick and are composed of lamina, unlike a tube worm shell.

The way the object is delaminating is interesting, more mammal-like than mollusk-like. But, I can't make a better guess than that.

 

[GatorBoy]

Your right Harry.. it is odd.
The layering reminds me of the way some sea shells deteriorate..Mabey not.
It does remind me of this cross section of a compressed algae type of Flint I photographed in north Florida.

 

[GatorBoy]

Here is a conch shell artifact from east central Florida.

 

[blueracer]

it is strange, I have found the tube worms before but this is a real mystery to me. I may have to take it to the university. thanks for your help guys.

 

[unclemac]

these things are sand shrimp burrow necks.....could your fossil be a mineral replacement within such a void?