ИСТИНА

On the basis of original materials of complex palyno-chronostratigraphic investigation the reconstruction, periodization and distant correlation of palaeoclimatic events and deposits of palaeoshelf, glacial, periglacial and extraglacial zones of Northern Eurasia within Brunhes chron have been carried out. The chronostratigraphical binding of identified palaeoenvironmental and sea-level events and corresponding horizons in the composite chronostratigraphical column has been carried out on the basis of ESR analysis of subfossil mollusc skeletal remains from marine, freshwater and Acheulian bearing cave-site deposits. More than one hundred and seventy shell samples from more than 40 sites along the continental margin of Eurasian north, in the Black and Caspian sea basins and terrestrial shells from Asheulian-bearing deposits in the Northern Caucasus were dated via electron spin resonance (ESR) method to produce a late Quaternary geochronology. The Pleistocene composite section of the loess-palaeosoil formation includes two reference Likhvin and Arapovichi sections from the centre of the East-European Plain. The palyno- chronostratigraphic record is interpreted as the product of six warm-climate/high sea-level events including the current interglacial during which marine sedimentation occurred on coastal areas now land, and six glacial events; they are presented either as complete climatic rhythms of glacial and interglacial rank, or by a considerable portions of climatic-phytocoenotic phases - constituents of the rhythm. Existed full-interglacial conditions are centred at about 580, 400, 310, 220 and 110 calendar ka. A broad correspondence between long palynological sequence, directly ESR-dated warm-climate-related events and other palaeoenvironmental records described in the literature has been noted for eleven upper oxygen isotope stages (11 to 1). The results obtained in this study exemplifies the potential of integrated chrono- climatostratigraphic sequence in linking marine and terrestrial palaeoclimate records which may eventually span the whole Brunhes time.