Moose I think you are maybe stuck on shapes (and doing a great job of that!) instead of looking at the actual work/chippin on the pieces and the types of material. Some of that material doesn't look like the quality, workable material that paleo man used if he could get it. The pic is small but I think there might be work on light colored piece on the far left side, upper 1/4, the bottom looks like it has flakes taken off....
That being said, I have found many very old pieces that, due to simplicity, thick patina and degradation are not recognizeable without a real good look, especially in-hand.
