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Rozwój rynny Miazgi–Wolbórki (Polska środkowa) w świetle analizy jej wypełnienia

Rdzany Zbigniew, Frydrych Małgorzata, Szmidt Aleksander

Przegląd Geologiczny

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2020

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Vol. 68, nr 7

584--600

EN

The subject of the analysis was a tunnel valley, weakly outlined in the landscape, located in central Poland, between Łódź and the Pilica valley to the west of Tomaszów Mazowiecki. The Miazga and lower Wolbórka flow along this valley. It is a 45-kilometre-long landform, mostly buried, partially covered with fluvial, slope and aeolian sediments, developed on a substratum characterised by varied palaeorelief and lithology. Sediments, which fill the valley, have variable thickness (10-100 m) and a non-flattened bottom gradient line, which indicates the possibility of water flow under hydrostatic pressure in a tunnel valley. Several segments of the channel cut into the Quaternary background. The filling consists mostly of glaciofluvial shallow braided rivers with average to low flow energy. In sedimentological terms, the deposits show significant similarity to the material of glaciofluvial kames found in the Łódź region. The authors believe there is a link between the accumulation in the tunnel valley and a particular variety of areal deglaciation, which was responsible for the formation of the fairly unvarying glacial relief. In outcrops in Łaznowska Wola, including the ones located in a hill that had been previously interpreted as an esker, some intrusive diapiric structures were documented, which reached the land surface. Thesefolded and locally disjunctive disturbances provide evidence for deformational origin of the hill.

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Glacial morphogenesis of uplands of the Warta Glaciation in Poland as a con trol on heavy metal distribution in deposits

Falkowska E.

Geological Quarterly

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2009

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Vol. 53, No 3

293-304

EN

The investigations were carried out to determine the relation ship between Cr, Co, Cd, Cu, Zn and Pb content and glacial morphogenesis that implies the geomorphological position of out crops of Quaternary deposits. The analysis deals with parts of two glacial uplands whose relief developed during deglaciation of the Warta ice sheet and which are characterized by similar relief and lithology of surface deposits. These are the Nidzica Upland near Grzebsk and the Bielsk Plain near Bielsk Podlaski. These areas show distinct regularity in pattern of geomorphological units, proving their areal deglaciation. Melt-out depressions, side valleys, ablation covers, kame terraces and kames as well as glaciofluvial plains are observed. The typical geomorphological element is isolated morainic hills (mesas). The investigations en abled determinations of regularity in the distribution of chemical eleements in the soil environment of the geomorphological units. Among mineral sediments, clay interlayers observed within kameter race and kame deposits were the most susceptible to concentrations of heavy metals, regard less of the region and the element to be determined. Lower Cd, Cu, Co, Pb, Zn and Cr contents were as sociated with morainic mesa and ablation cover deposits. The lowest contents of heavy minerals were mea sured in glaciofluvial plain, kame and kame terrace sands. Among land forms filled with organic deposits, the high estabilities to fix Cr, Co, Cu and Zn were shown by ice-dammed basins within upland deposits (Nidzica Upland) and side valley deposits (Bielsk Plain). Peats and muds of melt-out depressions were found to be most active in retaining Cd and Pb.

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Regularities in the occurrence of protection zones in polygenetic river valleys from the eastern part of the Polish Lowlands

Falkowska E.

Acta Geologica Polonica

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2001

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Vol. 51, nr 2

163-192

EN

The occurrence of organic soil cover in river valleys is typical regions that were to areal deglaciation. This feature results from the adaptation of a series of linear depressions of glacial melt-out origin by rivers for their flow. Such a series of depressions, primarily composing overflow lakes, underwent subsequent infilling with mainly lake and marsh deposits. These very thick deposits, characterised by high sorption potential and developed in the form of continuous structures, can be considered as effective protection layers, isolating groundwater from contamination