@vperez, it appears to be a broken lower third molar of Metaxytherium, an extinct genus of dugong.  Image 3756 is the crown view whereas image 3737 looks like the anterior or mesial view with a nice facet showing where it wore against the lower second molar.

Cool find!  Makes me jealous, because I used to live along Rattlesnake Creek in Ga…[Read more]