What are these rock marks?

Looking beyond this beautiful view, you will surely have spotted the round marks of ancient millstone extractions in the sandstone slabs.
There is also an engraved cross representing the former demarcation line between the territory of the County of Menthon and that of the monks of Talloires Abbey. In the 17th century, some of the stones were removed, probably for use as grinding stones for grapes, wheat, or walnuts and to produce wine, flour, or oil.