Savannah River Stemmed point

I found a splendid large projectile point (arrowhead in layman terms) on the beach at Edisto Island where I have a so-called tourist rental house. I just looked down and there it was right on the surface of the sand. It's really a good one as you can see from the photos. The photo on the sand is just as it lay, before I first touched it.

I didn't have any idea of it's origin but I had visions of it being real old, like made during cowboy times or maybe even pre-colonial times. My sister recently met an eminent archaeologist whose specialty is Native American archaeology. I sent him the two photos here and he identified it as a "Savanna River Stemmed point". He said it was chert, likely quarried near Allendale, SC and stained dark by a long rest in the marsh mud for about 4000 years. That puts it in the transition from the Middle Archaic to the Late Archaic cultural period of Native American prehistory. Dang! 4000 years! Here I sit holding this thing in my hand looking at all the little edges chipped away by some guy around the same time the biblical Abraham was about to cut his son's throat in a sacrifice commanded by God. (For those without a religious background, at the last minute God said, "Just kiddin'; I was just pullin' your chain to test your loyalty.")

Anyhow, holding this thing sends chills up my spine. It's like a voice from the past. I wish it could really tell me its whole story. Did it have a short useful life before it was lost? Or maybe it was lost and found for several cycles of life. Did it ever stick in a deer, a bison, a man? Wow!