Zapis procesów peryglacjalnych i wiek szczelin kontrakcji termicznej w południowo-zachodniej części poziomu katarzynowskiego (Polska Środkowa)
Record of periglacial processes and age of the thermal contraction structures in the southwestern part of the Katarzynów Level (Central Poland)

Summary/Abstract: The occurrence of periglacial processes in the past is possible to reconstruct on the base of evidences such as thermal contraction structures or stone pavement. Textural properties of deposits can also deliver important information. Investigations was carried in Rosanów site, located on the Katarzynów level – one of the levels of the edge-zone of the Łódź Plateau. In the study area sand till as host sediment of deformational structures occur. Some of the structures has typical features of the sand-wedge casts, the other were interpreted as clastic dikes. Textural analysis of the host sediments and de-posits, which fill thermal contraction structures allow to evaluate impact of periglacial environment on deposits. Thermoluminescence dating of host deposits, infilling of sand wedges and covering aeolian sand gives very similar results, so the age of structures was establish by the indirect indicators.

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