I know this is slightly off topic in that I found this 2 summers ago in a Scandinavian corn field. Any ideas are appreciated. I am guessing an axe or scraper.
Could you possibly lay it down flat and take some more pics in natural lighting? It has the shape of a large Celt or Chopper and actually looks like it may be flaked, but almost all the Flint Tools I have seen from that general area are always highly polished.