Article (Scientific journals)
Palsas and Lithalsas
Pissart, Albert
2013In Treatise on Geomorphology, 8 (16), p. 223-237
 

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Keywords :
Aggradational ice; Frost thrusting; Lapland; Lithalsa; Mineral palsa; Northern Québec; Palsa; Periglacial mound; Remnant of lithalsas; Segregation ice
Abstract :
[en] Palsas and lithalsas are mounds that contain lenses of segregation ice. They are islands of permafrost. These two kinds of mounds are very similar in shape, size, and origin. However, the palsas have a cover of peat which does not exist in lithalsas. The formation of ice in the core of these mounds requires material in which capillary water undergoes slow freezing. The remnants of lithalsas are depressions surrounded by ramparts, which does not exist after the melting of palsas. The processes involved in the formation of segregation ice are described in the beginning of the chapter. © 2013 Elsevier Inc. All rights reserved.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Pissart, Albert ;  Université de Liège - ULiège
Language :
English
Title :
Palsas and Lithalsas
Publication date :
2013
Journal title :
Treatise on Geomorphology
Publisher :
Elsevier Inc.
Special issue title :
Glacial and Periglacial Geomorphology
Volume :
8
Issue :
16
Pages :
223-237
Commentary :
9780080885223
Available on ORBi :
since 19 August 2020

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