Radiocarbon dating of organic macrofossils (mainly grass roots and shrub twigs) out of the yedoma deposits has been carried out at the Geological Institute of the Russian Academy of Sciences, with the participation of L.D. Sulerzhitsky, the sample preparation has been performed by the authors with in a month after the sampling. The AMS dating of microinclusions of the organic matter directly extracted out of ice has been carried out at the accelerator mass spectrometer at laboratory of the Seoul National University with the assistance of professor J.-Ch. Kim. The samples for dating were stored in a laboratory refrigerator at a temperature of -10 °C. 14C dates were calibrated using OxСal 4.3 [Ramsey, 2009] based on the Intcal13 calibration data [Reimer et al., 2013].