The zig zags at Afife are almost identical to those found at the base of a menhir that marks the Tetre Tumulaire de Manio and the eastern end of the Alignements de Kermario at Carnac. The menhir predates the alignements which now cross over the mound and the mound itself.
This kind of rock art is very common round Carnac and it's cool to see it elsewhere...