While digging a drain field for my Girlfriend, in Gainesville, Fl. I found lots of flakes, and such, and several pieces of chert, that looked identical to pictures of the ones with the "V" shaped notch. They were not fluted, but they had the V shaped notch. I don't have a clue as to what they were used for, except maybe scraping arrows, or something. But they were not much longer than an inch, or so, some were maybe 3/4 of an inch. I always get a kick out of seeing a written in stone archeological certainty being dismantled. Like during the iron age, stone stopped being used. Right. Iron was hard to come by, and expensive. So until it became more readily available, stone was used. Like the cap lock muzzle loaders, when they came out in 1840's they were readily adopted, but were not an over night switch, flint locks were still being used up to and past the 1850's, because of economics, and and caps were not always available, and flint was fairly common, plus it worked. When cartridge guns came available, muzzle loaders were still being used, as late as the 1870's. The cartridge guns were expensive, and ammunition was not always readily available.
Cool pictures, thanks for sharing.
Wayne