Radiocarbon dates of peat in palsas near Nikita Settlement, North-eastern part of European Russia, Usa River valley.The radiocarbon dates were obtained in the Radiocarbon Laboratory of the Geological Institute (GIN) of the Russian Academy of Sciences (Head L.Sulerzhitsky) and the Radiocarbon Laboratory (Head H.Jungner) at the University of Helsinki (Hel). δ¹³C values were measured at the Mass-spectrometry Laboratory of Helsinki University.