Depositional conditions on an alluvial fan at the turn of the Weichselian to the Holocene - a case study in the Żmigród Basin, southwest Poland
Journal Title: Geologos - Year 2016, Vol 22, Issue 2
Abstract
Presented are the results of research into the fluvio-aeolian sedimentary succession at the site of Postolin in the Żmigród Basin, southwest Poland. Based on lithofacies analysis, textural analysis, Thermoluminescence and Infrared-Optical Stimulated Luminescence dating and GIS analysis, three lithofacies units were recognised and their stratigraphic succession identified: 1) the lower unit was deposited during the Pleni-Weichselian within a sand-bed braided river functioning under permafrost conditions within the central part of the alluvial fan; 2) the middle unit is the result of aeolian deposition and fluvial redeposition on the surface of the fan during long-term permafrost and progressive decrease of humidity of the climate at the turn of the Pleni- to the Late Weichselian; 3) the upper unit accumulated following the development of longitudinal dunes at the turn of the Late Weichselian to the Holocene; the development of dunes was interrupted twice by the form being stabilised by vegetation and soil development.
Authors and Affiliations
Paweł Zieliński, Robert Sokołowski, Stanisław Fedorowicz, Barbara Woronko, Michał Jankowski
Keywords
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- EP ID EP290211
- DOI 10.1515/logos-2016-0012
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