Fossilized? bone with carving marks?

[Cappy Z.]

Found this awhile ago on a beach in Florida. Saved it, and always thought it appeared to have been cut by a sharp blade.

 

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[Tnmountains]

Just saw this in another thread it and made me think of your post. May have been caused by man?

http://www.verobeach32963.com/STORIES 2009/SEPTEMBER/vb63_boneauction_issue27_2009.html