Definition
Landforms produced in cold, nonglacial environments (Harris et al. 1988 and references therein) where annual freezing and thawing is present.
Formation
Periglacial landforms and landscape features form in perennially frozen ground, i.e. “permafrost” by freeze-thaw cycling, iterative thermal-contraction cracking, and frost-action (Wasshburn 1980).
Commonplace landforms are solifluction lobes or terraces (freeze-thaw cycling), clastically unsorted polygons (thermal-contraction cracking), and clastically-sorted polygons/circles (frost action) (Harris et al. 1988).
Degradation
The rise of mean temperatures on a local or regional scale may deepen the active layer, lower the permafrost table, and could reduce the areal extent of permafrost (Harris et al. 1988 and references therein).
Surface/Structural Units
Active layer: (seasonally frozen ground) the uppermost, suprapermafrost horizon of ground (soil or rock) subject to annual thawing and freezing, in areas underlain by...
References
Harris SA, French HM, Heginbottom JA, Johnston GH, Ladanyi B, Sego DC, van Everdingen RO (eds) (1988) Glossary of permafrost and related ground-ice terms. Technical memorandum No 142. Permafrost Subcommittee, National Research Council of Canada, Ottawa
Levy JS, Marchant DR, Head JW (2010) Thermal contraction crack polygons on Mars: a synthesis from HiRISE, Phoenix, and terrestrial analog studies. Icarus 206:229–252
Lozinski W (1909) Über die mechanische Verwitterung der Sandstein im gemässtigen Klima. Bulletin international de l’académie des sceinces et des lettres de Cracovie, classe des sciences mathématiques et naturelles 1:1–25
Muller SW (1947) Permafrost or permanently frozen ground and related engineering problems. U.S. Geological Survey, U.S. Army, Office of the Chief of Engineers, Strategic Engineering Study no. 62
Washburn AL (1980) Permafrost features as evidence of climatic change. Earth Sci Rev 15:327–402
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Feuillet, T., Matsuoka, N. (2022). Periglacial Landforms. In: Hargitai, H., Kereszturi, Á. (eds) Encyclopedia of Planetary Landforms. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-9213-9_258-2
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DOI: https://doi.org/10.1007/978-1-4614-9213-9_258-2
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Latest
Periglacial Landforms- Published:
- 18 October 2022
DOI: https://doi.org/10.1007/978-1-4614-9213-9_258-2
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Periglacial Landforms- Published:
- 11 August 2014
DOI: https://doi.org/10.1007/978-1-4614-9213-9_258-1