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Palaeoenvironmental and climatic changes during the early pleistocene recorded in the lacustrine-boggy-fluvial sediments at Komorniki, NE Poland

Khursevich G., Nita M., Ber A., Sanko A., Fedenya S.

Polish Geological Institute Special Papers

2005

Vol. 16

35--44

The lacustrine-boggy-fluvial sequence at Komorniki, NE Poland was subject to complex (geological, palynological, diatomological and malacological) investigations. These sediments occur between the Narevian and Nidanian glaciations tills and belong to the Augustovian Interglacial of Poland correlated with the Cromerian 1 Interglacial of the Netherlands. Two cold stages of a glacial rank and one warm stage of interglacial rank (with dominant pollen of Quercus, Ulmus, Carpinus, Alnus, Tilia and Corylus in sediments corresponding to the climatic optimum) have been distinguished in the pollen succession. The latter is similar to that known from the Augustovian Interglacial profiles at Szczebra, Kalejty and Czarnucha. Diatom succession from the Komorniki section includes certain unidentified, apparently new small species of Stephanodiscus, Staurosirella and Pseudostaurosira side be side with the Pleistocene extinct taxon of Stephanodiscus niagarae var. insuetus and a relatively widespread species of S. rotula characterizing by some morphological peculiarities. In the composition of the malacofauna the fluvial extinct species of Fagotia wuesti and Sphaerium cf. rivicola are the most important molluscs for the biostratigraphy. Among them, Sphaerium cf. rivicola is known from the late Tiglian in the Netherlands. Fagotia wuesti is characteristic of the Bavel Interglacial in the Netherlands, as well as of the Borntal and Artern interglacials in Germany.

Palynostratigraphy of the Poozerje Glaciation (Vistulian) in Belarus

Yelovicheva Y., Sanko A.

Kwartalnik Geologiczny

1999

Vol. 43, Nr 2

203-212

A palynological examination was applied to sediments of the last glaciation (Poozerie, Vistulian) in Belarus. Accompanied by geologic setting of deposits, as well as radiocarbon and thermoluminescence dating, the Poozerie sequence could be ascribed to three substages, i.e. Kulakovo, Dvina and Naroch. The Kulakovo substage (early Poozerie) corresponds to the oxygen isotope stage 5d-a, and comprises the West Dvina megastage with the short Black Shore interstage and the megainterstage (two stages of Mirogotshi and Sloboda, and three interstages of Chericov, Suraz and Polotsk). The Dvina substage (Pleniglacial), corresponding to the oxygen isotope stages 4 and 3, consists of the Mezin and Orsha megastages and the separating megainterstage with three middle Poozerie interstages (Turov, Shapurovo and Borisov) and two stages (Rogachevo and Michalinovo). The Naroch substage (oxygen isotope stage 2) represents the Late Glacial. There are several interstages during the Poozerie Glaciation: Chericov (Amersfoort), Suraz (Brörup), Polotsk (Odderade), Turov (Moershoofd), Shapurovo (Hengelo) and Borisov (Denekamp).

Na podstawie metod palinologicznych przedstawiono podział stratygraficzny osadów ostatniego zlodowacenia (poozierskiego, wisły) na Białorusi. Badania prowadzono równolegle z badaniami geologicznymi oraz datowaniem osadów metodami radiowęgla i termoluminescencji. Wyróżniono trzy podpoziomy: kułakowski, dźwiński i naroczski. Podpoziom kułakowski, odpowiadający stadium izotopów tlenu 5d-a, składa się z megastadiału zachodniodżwińskiego i megainterstadiału (w skład którego wchodzą stadiały mirogoski i slobodski) oraz trzech interstadiałów (czerikowskiego, surażskiego i połockiego). Podpoziom dźwiński (pleniglacjał, studia izotopowe 4 i 3) zawiera dwa megastadiały (mezyński i orszański), miedzy którymi jest megainterstadiał z trzema interstadiałami (turowskim, szapurowskim i borysowskim) i dwoma stadiałami (rogaczewskim i michalinowskim). Najmłodszy podpoziom, naroczski odpowiada późnemu glacjałowi zlodowacenia poozierskiego (stadium izotopowemu 2). Odpowiednikiem interstadiału czeńkowskiego jest amersfoort, suraźskiego-brörup, połockiego - odderade, turowskiego - moershooft, szapurowskiego hengelo i borysowskiego - denekamp.