 The motifs incorporate undulations of the surface into their design so that most are connected to each other by artificial grooves or by a natural rock slope which allows water to flow from one design to the next.This phase is believed to be Neolithic, and probably early Neolithic at that.This is supported by the discovery of what appears to be a broken sandstone axehead 1.2 m from the carved rock outcrop at the base of the topsoil.