Thanks for the response!
I don't think the nipple was struck twice.
It was formed and struck after patina had formed on the original flake scar, shattering the patina off the nipple portion itself. The nipple itself was likely new, formed just to get this flake, which is confusing in itself.
The nipple was formed in the bottom of that previous flake scar, which is as confusing to me, as the previous flake scar having a patina on it before it was removed with this flake. The piece of the patina from the other edge is still there to be seen, and it ends at the edge of the flake.
I would agree that it was a thick thinning flake, if not for the other edge being present proving it to be an overshot. It might have been an accidental overshot, because the part that reached the other edge is along one of the previous ridges, and there was what appears to be an old crack in the rock at that point. You could make the argument that the other end was the platform, except it shows no sign of ever having been struck, and there is a clearly struck nipple on the other end. It would make more sense that way, as a flake taken down a ridge that just got out of control because of an unseen crack, but the nipple and the patina shattered off of it, tell a different story.
The nipple placed in the bottom of a deep scar confuses me. I would have formed it at the end of one of the ridges formed by the previous scar. Especially if thinning was the goal. This flake is thicker than many points all by itself.
I am confused by a tool having been made, using wide arching flakes with parallel sides that appear to be overshot scars, being old enough to have patina formed on those scars, and then someone taking this kind of flake off it, all those years later.
It may be something worked off of an older artifact, by a much younger people much later in time. Why is a big question.
The way the flake came off, the center of the flake is actually lower than either end of the flake, which means if it was a biface, it was literally almost cut in half.
If you say the patina formed later, after the flake was taken, then the nipple should have patina too. It doesn't, and you can still clearly see the edges where the patina shattered when it was struck. The patina was clearly there, before the flake was taken. On the other edge, the patina is solid until it hooks under the flake, and then is changes to what appears to be an old crack near the end away from the nipple, which might be why the flake became an overshot to begin with.
The only thing that makes sense is an older tool, old enough have formed a significant direct exposure type patina, then had someone make a nipple in the bottom of a previous scar, and the flake went all the way across the piece, at least that I can figure.
I would be very willing to allow anyone to see it that is actually interested in such things. Most simply ignore my questions I think.
I have tried to find ways around that conclusion, but they all run into contrary conditions until you use that one. Did you ever set a nipple in the bottom of a flake scar?
I am beginning to agree with you on overshot not really meaning all that much. I just posed such a question on PaleoPlanet, because several of the Adena artifacts I am examining show the remains of overshot or very close to overshot flakes. I am starting to think it is only an important detail in context with style.