The Pazyryk burials are a number of Iron Age tombs found in the Pazyryk Valley of the Ukok plateau in the Altai Mountains, Siberia, south of the modern city of Novosibirsk, Russia; the site is close to the borders with China, Kazakhstan and Mongolia. The tombs are Scythian-type kurgans, barrow-like tomb mounds containing wooden chambers covered over by large cairns of boulders and stones, dated to between the 6th and 3rd centuries BCE. The spectacular burials at Pazyryk are responsible for the introduction of the term kurgan, a Russian word of Turkic origin, into general usage to describe these tombs. The region of the Pazyryk kurgans is considered the type site of the wider Pazyryk culture. The site is included in the Golden Mountains of Altai UNESCO World Heritage Site. The bearers of the Pazyryk culture were horse-riding pastoral nomads of the steppe, and some may have accumulated great wealth through horse trading with merchants in Persia, India and China. This wealth is evident in the wide array of finds from the Pazyryk tombs, which include many rare examples of organic objects such as felt hangings, Chinese silk, the earliest known pile carpet, horses decked out in elaborate trappings, and wooden furniture and other household goods. These finds were preserved when water seeped into the tombs in antiquity and froze, encasing the burial goods in ice, which remained frozen in the permafrost until the time of their excavation.