Howden Hill boulder

Nice big boulder proud above the ground with what seems like eight cup-marks, of different sizes, on its top surface. But is it (I hear you ask) a true example of prehistoric rock art? The depressions have clearly been subject to much erosion and weathering by rain, wind and frost, possibly over a great number of years. All traces of their human origins (such as peck marks) would of course have disappeared and there are no rings around any of the cups or other additions that would prove a human was involved in at least their initial formation. There are, however, good examples of prehistoric cup-marked boulders in the vicinity, arguably better preserved under turf. Bronze Age cairns are nearby. The alternative view of their formation is one of geology and weathering. Fluting and basins are often seen on exposed sandstone, particularly on upturned boulders and standing stones. What is the effect of weathering on known rock art: over-deepening and enlargement of existing hollows, or a smoothing of the surface? Source: Objaverse 1.0 / Sketchfab