| Abstract [eng] |
This work has been made when all geological data has been collected during field works in Buivydziai outcrop, where middle and later pleistocene frontal glacial sediments and river sediments are spread. Aim of research was to evaluate geological conditions of Snaigupele interglacial, according to Buivydziai outcrop. I analyse malacofauna in aquatic sediment, palynological and carbonates composition of carbonatic tufa, analyse sedimentation characteristic trough middle and later pleistocene. For this purpose, these problems were solved: · Previous geological research data analysed; · Rational research methods chosen; · Research in Buivydziai outcrop were made; · Samples for laboratory analysis taken; · Laboratory analysis of samples made; · Tables, diagrams and curves of data, obtained during field and laboratory work built. · Generalisation of obtained data: - Geological structure of region, - Data of palynology, - Data of carbonates, - Data of malacofauna, All obtainable material for determination of the Buivydziai geological conditions used, which was analysed using integrated method. After completing analysis of geological structure, we made several geological conclusions. We found that close to researching outcrop, pleistocene layers, which exceed 72 m, occurs on heterogeneous middle Devonian and Silurian rocks with big stratigraphic discontinuity and rough surface. In this outcrop, two different age glacial horizons(Medininkai and Nemunas glaciation Grūda stage) stands out. We found four different cycles of sedimentation in Buivydziai outcrop. There are the first cycle of sedimentation, related to Snaigupele, on the bottom and the other three cycles in the upper side. Data of palynology shows, that these aquatic sediments can be related to Snaigupele interglacial and there are S4, S5 and S6 pollen zones. Data of carbonate analyse provide us information, that there are aquatic tufa. Both, palynology and carbonate researches inform us, that there are fall of temperature tendency. We founded, that there are only unknown originated land malacofauna. Work contains of introduction, few chapters (research history, methodology, obtained data) and conclusions. There are 28 pages of text, 8 pages of illustrations and four tables. |
