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’It is quite surmountable in early spring dog sledding.' The experts believe ‘it is possible that some types of ‘trade hub’ existed in the Siberian Arctic for the exchange of valuable resources, such as stone raw materials, furs and other items’.It was around 7,800 years ago that the the territory of Zhokhov became detached from the mainland.They were examined using non-destructive X-ray fluorescence (XRF) to compare the obsidian with known sources in northeastern Siberia.The geochemistry of the Zhokhov artefacts shows with 90 per cent confidence that it came from a source at Cape Medvezhiy on Lake Krasnoe in Chukotka.‘Sledge transport formed an important part of the subsistence technology of the Zhokhov site’s inhabitants.It also should be stressed that these people were skilled travellers, who regularly visited today’s New Siberia, Faddeyevskiy and Kotel’nyy Islands to the south and west of the site—as indicated by the presence of raw materials procured from these locations.' They believe that ‘dog-sled technology, the environment and phenology have remained largely the same in the East Siberian Arctic regions for millennia, regardless of developments such as the introduction of metals, pottery or other innovations.The conclusion is that ancient people used dog sleds to cover these remarkable distances 'at the ends of the earth'.

‘In this case, the distance between the exchange points is about 700 km.Winter temperatures in the area of interest, were probably like the southern United States today, so we can rule out dog-sledding.Sea level was more than 100 metres below present making that location accessible.The presence of other Mesolithic sites on the north-eastern Siberian Arctic mainland testify — indirectly — to the active contact between human groups across this region.' The international team of researchers comprised Vladimir Pitulko (St Petersburg), Yaroslav Kuzmin (Novosibirsk), Michael D.Glascock (USA), Elena Pavlova (St Petersburg) and Andrei Grebennikov (Vladivostok).

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