Morfologia osadów podłoża zlodowacenia Wisły na obszarze polskiej części lobu Odry
Abstract
Morphology of the Vistulian (Weichselian) glaciation substratum in the area of Polish part of the Odra lobe.
S u m m a r y. During the last Scandinavian glaciation in the area of Polish Lowland, substratum of the ice sheet consisted mainly of till melted out during the Saalian glaciation. The substratum morphology and thickness might have influenced formation and dynamics of the ice sheet lobes. Nowadays, morphology of the top and bottom surface of till in the area of the Polish part of the Odra lobe have been mapped using 642 (top surface) and 596 (bottom surface) records put to interpolation. The resulting maps show actual range of the till altitudes ranging from 135.7 m for top surface to 176.9 m for bottom surface and general trends of its spatial pattern. Reconstructed morphology of the Vistulian ice sheet substratum indicates an average thickness of the till being ca. 26.7 m. The highest thickness was approximately 80–110 m; thus heavily blocking the possibility to drain basal meltwater as a groundwater towards the ice sheet forefield.
S u m m a r y. During the last Scandinavian glaciation in the area of Polish Lowland, substratum of the ice sheet consisted mainly of till melted out during the Saalian glaciation. The substratum morphology and thickness might have influenced formation and dynamics of the ice sheet lobes. Nowadays, morphology of the top and bottom surface of till in the area of the Polish part of the Odra lobe have been mapped using 642 (top surface) and 596 (bottom surface) records put to interpolation. The resulting maps show actual range of the till altitudes ranging from 135.7 m for top surface to 176.9 m for bottom surface and general trends of its spatial pattern. Reconstructed morphology of the Vistulian ice sheet substratum indicates an average thickness of the till being ca. 26.7 m. The highest thickness was approximately 80–110 m; thus heavily blocking the possibility to drain basal meltwater as a groundwater towards the ice sheet forefield.