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The Government of Canada’s terminology and linguistic data bank.
EDIFICE ROCHEUX EJECTION GELIVALE [1 record]
Record 1 - internal organization data 2011-01-06
Record 1, English
Record 1, Subject field(s)
- Glaciology
Record 1, Main entry term, English
- bedrock heave feature
1, record 1, English, bedrock%20heave%20feature
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- rock heave feature 2, record 1, English, rock%20heave%20feature
correct
- rock-heave feature 1, record 1, English, rock%2Dheave%20feature
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Frost heaving of bedrock is a widespread process in permafrost regions which may generate forces and movements that detract from the otherwise sound foundation performance usually associated with bedrock. Depending on pre-existing fracture fabric, bedrock heave features may take the form of single ejected blocks or dome-shaped accumulations of up to several meters in diameter. ... a pore-water expulsion mechanism can be invoked to explain the origin of the forces producing large rock-heave features ... The entrapment of groundwater in a closed system creates zones where high hydrostatic pressures can be developed. This process is common in the highly cohesive, crystalline rocks of the Canadian Shield. ... rock heave features comprised of a bent discontinuous layer occur where the water-filled gap is overlain by several blocks and where the fractures dip outwards ... 1, record 1, English, - bedrock%20heave%20feature
Record number: 1, Textual support number: 1 OBS
rock heave feature: term used at Natural Resources Canada - Earth Sciences Sector. 3, record 1, English, - bedrock%20heave%20feature
Record 1, Key term(s)
- bedrock-heave feature
Record 1, French
Record 1, Domaine(s)
- Glaciologie
Record 1, Main entry term, French
- édifice rocheux d'éjection gélivale
1, record 1, French, %C3%A9difice%20rocheux%20d%27%C3%A9jection%20g%C3%A9livale
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 OBS
Les édifices d'éjection gélivale : un bon indice de la présence de pergélisol. - Les édifices rocheux d'éjection sont des formes périglaciaires résultant du déplacement vertical de fragments du substrat rocheux. Les fragments produits par gélifraction au droit des fissures et des diaclases sont poussés au-dessus de la surface environnante par l'action du froid. Signalés dès la fin du XIXe siècle, ils n'ont été décrits et étudiés convenablement que récemment. Ils sont fréquents dans l'hémisphère nord, en particulier au Canada, au Groenland et au Spitsberg. On les trouve dans les principaux types de roches affectés de réseaux de diaclases. Les blocs éjectés montrent souvent des parois altérées et couvertes de lichens crustacés [...] Le soulèvement des fragments est lié à l'action du froid, notamment à la gélifraction, la gélidisjonction et aux pressions causées par le gel de l'eau dans les fissures. Les formes actives et non actives se rencontrent dans des régions où le pergélisol existe. 2, record 1, French, - %C3%A9difice%20rocheux%20d%27%C3%A9jection%20g%C3%A9livale
Record number: 1, Textual support number: 2 OBS
édifice rocheux d'éjection gélivale : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre. 3, record 1, French, - %C3%A9difice%20rocheux%20d%27%C3%A9jection%20g%C3%A9livale
Record 1, Spanish
Record 1, Textual support, Spanish
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