Dugong rib or something else?

[SCfossilnewbie]

Can I get help identifying this? I found on a fossil dig at a land site in Summerville, SC. My guide thought it was a mammoth tusk. But after getting home and cleaning, I do not see schreger lines. So I believe it may be a dugong rib, but am not certain. 

[Thomas.Dodson]

Yep, looks like a dugong rib. I'm guessing it feels so dense and heavy you could break down a door with it. I'm always impressed by their density.

[pachy-pleuro-whatnot-odon]

Hi @SCfossilnewbie, and welcome to the forum!

 

Like Thomas said, this does look like pachyosteosclerotic bone rather than ivory, which would thus make it dugong rib

[SCfossilnewbie]

Thanks so much for your help identifying. It is super dense and heavy!