Well., yeah im not sure about the shells, or the bone, but im 99% sure the others have been used, i had "big guys" from pa state museum confirm that, its all about location!!! My finds aren't just random rocks from a random creek all came off a site i had registered w/the state as an actual site, like a 1/4x1/4 sq mile area , that it , PLUM LOADED! honestly I have a theory about Clovis being at/around/using this site on way from Meadowcroft to Paleo Crossing a co. Was building so all the prelim state test pits were taken , & lol they only found a handful of flakes �� ���� , so after the dozers skimmed the plow line off , they hit this layer of idk " moon dust" ,, just fluffy good dirt, that was VOID of all / any "natural" (unworked) stones /rocks , at one point everything you could see after 1st rain was an artifact! Dozers clipped 4 fire pits in row deep! Below plow line, was 14-24inchs down, in virgin soil, just above the bedrock outcrop on this bluff/saddle, it was UNREAL! for me anyway, so yeah the site is burried now so all my earlier finds came out of that " moon dust" layer. So now