Reading a claim, somewhere online, about the St Michael's Way being a route in use from 10,000 BC, and later to c450AD with the Saints, and for pilgrimages, it set me wondering just why, as the effects of Isostatic Rebound were already in motion, as was the Polar Melt. Making corrections for the zero line north of Penwith, and making the shores of sand/silt rather than soil, this is the line of coast in Neolithic times. Obviously, cliffs had more substance on their face at that time, but that is not plotted.
