 In the low-lying atolls of eastern Micronesia, rock art is rare to nonexistent, due to the absence of suitable rock surfaces for painting or engraving.In Polynesia, rock art is dominated by petroglyphs, rather than paintings, and they show less variation than the rock art of Near Oceania and ISEA.In the western Polynesian islands nearest to Island Melanesia, rock art is rare (like in Tonga and Samoa) or are absent entirely (like in the Cook Islands).