Unikalne stanowisko interglacjału eemskiego w Ruszkówku na Pojezierzu Kujawskim

Abstract

UNIQUE CHARACTER OF THE EEMIAN INTERGLACIAL SITE IN RUSZKÓWEK (POJEZIERZE KUJAWSKIE, CENTRAL POLAND) Summary In the vicinity of Ruszkówek (Fig. 1), where exsist a depression caused by tectonic movement, were found thick (14-18 m) lacustrine and boggy sediments (Figs 2, 3). They consist of calcareous and calcareous-silty gyttja (10-12 m thick) and peats (1-1,5 m thick), and partly, lacustrine and fluvial sands and silts. These sediments are situated between good expressive layers of till, which can be easy correlate with analogical layers of another brown coal mines in the Konin region, and therefore these interglacial lacustrine sediments are a stratigraphic marker for the younger Pleistocene in Middle Poland. The sediments in the site Ruszkówek have been analized from petrographic, palynological [3] and faunistic point of view. In these lacustrine sediments were found remains of different faunal assemblages: gastropods (15 species), bivalves (7 species), ostracods (14 species), fish remains (6 species), as well as some beetle remains and Cladocera (ephippium). In gastropod assemblage was found Paladilhia marginata (Michaud) - guide species of Eem Interglacial in Poland. Among ostracods was found Scottia tumida (Jones), the upper stratigraphic boundary of which must be dislocate from Mazovian to Eem Interglacial.