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BOURRELET ARQUE [1 record]

Record 1 2012-04-05

English

Subject field(s)
  • Geomorphology and Geomorphogeny
  • Hydrology and Hydrography
  • Erosion and Weathering (Geol.)
DEF

A long, curving, parallel ridge (scroll) that during stages of high water has been aggraded against the inner bank of the meandering channel, while the opposite bank experienced erosion.

CONT

Point bars, on the inside curve of meander scrolls, are also favourable sites for heavy mineral deposition during flood conditions.

CONT

Meander scrolls can be seen from a plan view. [Source: Decade of North American Geology, Volume 1, chapter 11.]

French

Domaine(s)
  • Géomorphologie et géomorphogénie
  • Hydrologie et hydrographie
  • Érosion et corrosion (Géologie)
DEF

Relief en forme de croissant, dû à un dépôt de sédiments accumulés sur la rive interne d'une boucle de méandre.

CONT

La rive convexe [du méandre] est plus basse, en pente douce et jalonnée par des bancs arqués épousant la courbure quoique avec un rayon plus grand.

CONT

Les stades de l'accrétion latérale peuvent être marqués par des bourrelets arqués [...] que séparent des gouttières [...]

OBS

banc en croissant : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

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