Introduction
Given the incompleteness of the Pleistocene geological record in most of Northern Eurasia, the solution of issues of detailed dissection of recent sediments and correlation of interglacial / glacial horizons, both periodization and comparison of climate-related paleogeographic events, should be based primarily on knowledge of the spatial and temporal patterns of flora, vegetation and climate development established from paleogeographic materials of the stratoregions studied in detail in this territory.
Priority in determining the regularities of changes in the nature of the Earth in the Pleistocene belongs to Academician K. K. Markov (1960). Materials on the history of vegetation cover were among the most important paleogeographic evidence, on the basis of which he concluded that the main patterns of changes in the natural environment are orientation, rhythm and metachronism (local individuality). All subsequent decades of studying these materials by paleogeographers were devoted to the accumulation and synthesis of new analytical data in order to identify the features of the directed development of the natural environment, determine the number of warm and cold rhythms of different ranks within the Pleistocene, as well as the regional specifics of the natural process in various natural history areas.
Currently, fractional climatostratigraphic schemes of the Neo-Pleistocene of the continental regions of Northern Eurasia are based on continuous records of interglacial and glacial landscape-climatic successions reconstructed based on the results of a detailed palynological analysis of the most complete sections of the European subcontinent. Similar palynoclimatostratigraphic records were obtained for sections of southern Western Europe-Boucher/It is found in the south-east of the Central Massif in France (Reille and Beaulieu de, 1995; Reille et al., 1998), Castiglione in Central Italy (Follieri, Magri, Sadori, 1988), and Tenagi Philippon in North-Eastern G ...
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