4.2 Article

Periglacial structures within fluvio-aeolian successions of the end of the Last Glaciation - examples from SE Poland and NW Ukraine

Journal

BOREAS
Volume 43, Issue 3, Pages 712-721

Publisher

WILEY
DOI: 10.1111/bor.12052

Keywords

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Funding

  1. Polish Ministry of Science and Higher Education [N N 306 197639]
  2. Science and International Cooperation, UMCS

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The nature of permafrost and related environmental conditions in the Weichselian Late Pleniglacial and Lateglacial are reconstructed based on the assessment of frost structures that are best documented in the Loess Belt and in plateau areas composed of glacial till. Investigations were conducted in the central-eastern part of the European Sand Belt (SE Poland and NW Ukraine) on a fluvio-aeolian sedimentary succession and took into account its chronological context given by luminescence dating. Various generations of periglacial structures found in these deposits indicate not only the development of permafrost (ice-wedge pseudomorphs) and decreased humidity (composite wedge casts) but also the degradation of permafrost (large-scale involutions) and, finally, the establishment of deep seasonal frost (frost cracks). The diversity of structures in the study region appears to result from local conditions rather than increasing continentality of climate towards the east.

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