Pebble Tool Scraper?

[Unitedstatesofamerica1]

 

[tnmudman]

I think its just a busted rock.I guess its possible that it was used though.

 

[tamrock]

Yeah it may have been used by the hand of man at one time, but natural forces, could have also created the same effects.

 

[joshuaream]

That's a bit bigger than a pebble.