I'm new here. This large blade was found down in Providence Canyon, Ga. (Stewart County) back in the late 1970's. I don't recall now if it was found down in the canyon or up at ground level on the edges, it's been such a long time since we found it. Folks on this site seem to know their artifacts. We're cleaning out my Dad's house now, and I'm finally getting around to asking for help understanding it, and how old it might be, where it came from. It has a kind of interesting "biological" patina on it, like someone has carried it around for a long time. Any opinions about it? Thanks a lot.