How do you date these with any certinty? what is BP? I dont know any thing about dating these artifacts but the big one could be the spear point since it has the notches to tie it to a shaft. The little one looks like an arrow head to me and I have seen flint knives with bone handles. so just from my ignorant view that is what they look like, just a guess. How do we know they were not lost by an indian in say 1780 AD? I have seen lots of obsidian in Calif in the Mono area and they say they traded it up to 600 miles away. Thats a long walk.