A discussion of the pollen sequence in loess and interstadial organic silts (thaw‐lake deposits, peat and organic loess) distinguishes two types of spore‐pollen spectra. One is close to the spectra found on the present southern margins of the tundra zone; the second has no present‐day analogs and reflects landscapes that were not only treeless, but shrubless, with a predominance of grasses (tundra‐steppe). The sequence from tundra spectra on the bottom to tundra‐steppe on the top can be traced in the thickest sections. Vast areas in the maritime lowlands of Yakutia consist of a unique, up to 60 m thick sequence made up mainly of aleurites and containing a large amount of segregation ice, particularly polygonal vein ice. This sequence is known as the Oyogos, Mus‐Khaya, Vorontsovo, and Yedoma formation in various parts of the lowland. The name “glacial sequence”;, as proposed by P. A. Solov'yev for similar sequences in central Yakutia, is quite suitable as a collective term.