13 research outputs found

    Proposed nature path in the catchment Rabien peatland near Lodz

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    Eemian to Early Weichselian organic deposits in the watershed kettle-hole basins in central Poland

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    In the examined part of central Poland, there are numerous kettle-hole basins filled with mineral and biogenic sediments of the Eemian Interglacial and Early Weichselian. These basins are located in varied geological and geomorphological locations with variable thicknesses of the sediments and deposits. The infillings were investigated by lithological and palaeobotanic methods. Lithology of the biogenic sediments is diverse, primarily gyttja and peat, but also organic silt. A number of the documented sites contain a record of environmental changes throughout the glacial-interglacial cycle from the end of the Warta Stadial (Saalian) to Early Weichselian. Local geological, geomorphological and hydrological conditions influenced the possibility of continuous peat-lake accumulation and the timing of the completion of this accumulation. Biogenic sediments are covered with the Middle and Late Weichselian mineral sediments which indicate climatic changes and are the main reason for rapid and synchronic degradation of kettle-hole infillings

    Origin and Neoholocene evolution of spring-fed fens in Wardzyń, Łódź Upland, central Poland

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    Spring-fed fens in Wardzyń represent the rare group of alkaline mires supplied by artesian groundwater. Using multidisciplinary methods (including sedimentological, hydrometric and hydrochemical, pollen, macrofossil, malacological, geochemical, radiocarbon dating, and stable oxygen and carbon isotope analyses) we have been able to (1) reconstruct the main phases of spring-fed fen development, and to (2) determine the cause of Neoholocene groundwater ascension responsible for the mire inception. These phases are characterized by cyclic organic (peat) and carbonate (tufa) sedimentation associated with the Holocene fluctuations in humidity and temperature. The beginning of the activation of hydrological systems (involving the flow of confined groundwater of the Cretaceous aquifer) at Wardzyń occurred in the Subboreal period of the Holocene, after a long episode of decreased humidity initiated ca. 4.2 ka cal BP
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