I’ve been walking along the south fork San Gabriel river here in Austin texas, have found plenty of chips and cores. But no points? I’ll post a pic to show you how much I’ve found.
The rock with the hole in the bottom right isn’t an artifact, just a cool rock.
The river was the flint source. They gathered suitable material there and carried it to a place to reduce it and knap points. They did this especially if there were competing groups using the quarry/river for flint. Somewhere, probably within a mile, is their knapping station. High quality material you pictured. Love to go there and chip. Gary