I saw this thread this morning and wanted to respond but didn't have time . The blade is what caught my eye. In the picture it appears obviously to have been knapped.so as to be hafted in the middle of the blade and if so would have been wielded like an axe. I have seen flint (chert) axes or if one prefers the term axe handled blades but they're certainly not very common, at least not in my area. Neat piece, congrats!