No, it's twenty or thirty years. Maybe that is tomorrow.

The example of laminar erosion you show doesn't explain how the notches or grooves spiral down the tops of some stones, and cross the bedding planes. It would be handy to find one of these grooved long stones that had been buried accidentally and then to look closely for signs of tooling. But they were always set facing the sky. I know from the Blackstone that if you have anything slightly different then nobody wants to know and will invent ridiculous explanations just to avoid the (simplest) conclusion 'homemade'.