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The subject of this research is the ratio of isotopic parameters of deuterium of heavy oxygen&amp;nbsp;in ice wedges. The authors considered such parameter as inclination of the line of the ration of deuterium of heavy&amp;nbsp;oxygen&amp;nbsp;in ice wedges. Proximal to GMLV (or LLMV) position of isotope values for ice wedge and inclination of the line&amp;nbsp;proximate&amp;nbsp;to 8 suggests that the ice wedge was formed from atmospheric precipitation&amp;nbsp;(winter snow). The article provides separate examples of anomalous deuterium ratios of heavy oxygen with very low ration of line inclination, which in combination with the abnormally low dexc values indicate the indicate isotopic fractionation processes in snow before melting and/or melting snow water before filling frost-cutting cracks. Three author determines the three main types of ratios of deuterium m of heavy oxygen content in ice wedge: a) normal ratio &amp;delta;2H-&amp;delta;18O (with line inclination of the ratio proximate to GLMV or LLMW). b) ratio of deuterium&amp;nbsp; of heavy oxygen to deviation from GLMV or LLMW (with signs of change in the primary isotope signal of atmospheric precipitation), c) anomalous ratio of deuterium of heavy oxygen. It is shown that the first two types&amp;nbsp; are characteristic to most ice wedge under study in the vast part of the Russian cryolithozone from the European North to the east of Chukotka; the third type is obtained for several Holocene ice wedge in Transbaikal and upper Yenisei River. This may be explained by significant isotope transformation of snow cover in the conditions of distinctly continental climate.	

Ratio of isotopic parameters δ2H-δ18o in Late Pleistocene and Holocene ice wedge