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Pleistocene periglacial structures and landforms in Western Czechoslovakia

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  • Tadeáš Czudek

Abstract

The paper describes periglacial structures and landforms developed under Pleistocene coldclimate conditions in western Czechoslovakia. The thickness of Upper Pleistocene permafrost in this territory may have been between 50 and 250 m. Climatically controlled valley asymmetry developed because of different cryogenic processes on opposite valley sides and lateral stream migration (mainly due to thermal erosion). In some cases cryopediment‐like foot‐slopes developed due to down‐wearing of river terraces and/or to the combined effect of down‐wearing and back‐wearing. Le présent article décrit des structures et des formes de terrain apparues sous les conditions climatiques périglaciaires du Pléistocène dans la partie occidentale de la Tchécoslovaquie. L'épaisseur du pergélisol au Pléistocène supérieur peut avoir atteint entre 50 et 250 m. L'asymétrie des vallées s'est développée par l'action de processus cryogéniques différents sur les cǒtés opposés des vallées et par une migration latérale des cours d'eau, migration contrǒlée principalement par l'érosion thermique. Dans quelques cas, des cryopédiments se sont développés au pied des versants à la suite de l'abaissement des versants surmontant des terrasses fluviatiles et à la suite de l'effet combiné d'un abaissement des versants et/ou d'un recul de ceux‐ci parallèlement à eux‐měmes.

Suggested Citation

  • Tadeáš Czudek, 1993. "Pleistocene periglacial structures and landforms in Western Czechoslovakia," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 4(1), pages 65-75, January.
    • Handle: RePEc:wly:perpro:v:4:y:1993:i:1:p:65-75
    DOI: 10.1002/ppp.3430040106
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