STANOWISKO OSADÓW JEZIORNYCH INTERGLACJAŁU MURAWIŃSKIEGO (EEMSKIEGO) W RUMLÓWCE KOŁO GRODNA (BIAŁORUŚ)

Abstract

A LOCALlTY WITH LACUSTRINE DEPOSITS REPRESENTING THE MURAVIAN (EEMIAN) INTERGLAClAL IN RUMLÓWKA NEAR GRODNO (BELARUS)

Abstract. The paper presents resuits of multi-disciplinary studies of the lacustrine deposits from Rumlówka near Grodno. Geological studies show that the strata are represented by marls and clayey silts and are covered by sands and sands wilh gravel representing of the fluvioperiglacial and deluvial accumulation of the highest (VI) terrace of Niemen. Pollen analyses werer conducted in the upper part of the marls and clayey silts in the Rumlówka 2 section. These deposits correspond to the younger part (from the Carpinus to the
Betula+Pinus+NAP phase) of the Muravian (Eemian) Interglacial and the oldest part of the Poozerian (Vistulian) Glaciation. Diatom analyses of the younger part ofthe Muravian Interglacial allowed distinguishing five Local Assemblage Zones L DAZ DR-1 to DR·5, and as a result, also five stages of the lake evolution, from deep bas in (oligotrophic lake), through a reservoir with oscillating water level (oligomesotrophic lake), to a distinctly shallowing environment (eutrophic lake). The analysis of abundant malacofauna along with teeth and bones of mammals preserved both in the lake deposits as well as in the overlying fluvial deposits indicated intermingling of thermo- and cryophilous forms. This phenomenon is typical of the terminal part of the last interglacial (Muravian, Eemian) and the initial part of the last glaciation (Poozerian, Vistulian) in Central Europe.