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Permafrost is defined as ground that remains below 0 °C for at least two years. As a natural conservation agent, it provides an archive of environmental proxy records including biological materials of vegetable, animal and human origin, and artifacts, particularly those made of organic materials such as wood, bone (antler, ivory), or fibers deriving from plants or animals. Permafrost may contain up to 60 % of ice or virtually none at all. Atmospheric heat and water alter deposits quickly, and dramatically affect the preservation of archaeological sites. Finding sites in this terrain still depends on artifacts or cultural layers exposed by chance. Test pits, aerial and geophysical methods have not been successful except for the most recent sites of approximately past 2,000 years or so. Early Holocene and Pleistocene sites, particularly in Siberia, still remain fully frozen. Not many of them are known up to now, but in all cases, they are encased in ice-rich...
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References
Pitulko, V. V. 2008. Principal excavation techniques under permafrost conditions (based on Zhokhov and Yana Sites, northern Yakutia). Archaeology, Ethnology and Anthropology of Eurasia34(2): 26-33.
Pitulko, V. V. & E. Y. Pavlova. 2010. Geoarchaeology and radiocarbon chronology of the Stone Age of the North-East Asia. Saint Petersburg: Nauka.
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Pitulko, V. (2014). Permafrost Digging. In: Smith, C. (eds) Encyclopedia of Global Archaeology. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-0465-2_1513
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