Hey Neal,

I've collected fossils at Edisto Island Beach since 1975 and have a good assortment of Pliocene and Pleistocene material from there.  Your fossil looks like a manatee rib bone.  Is the specimen solid and heavy, and is marrow channel a small diameter?  If so, it's manatee.

You can only speculate what made the cut marks in the rib.  Most likely postmortem and a predator / scavenger with sharp teeth.  Paleo points have never been found washed up on the beach, so it's probably safe to say that a human did not make them, but there were plenty of sharks and large carnivores during those periods.

Great find.  Show us more of your Edisto finds.

Dennis

Dennis,
We have been going down there for at least 20 years. Let me look around and see if I have anything else. Thanks for the identification its been bugging me for a couple of years.