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CREVASSE SPLAY [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-12-12

English

Subject field(s)
  • Geomorphology and Geomorphogeny
DEF

A landform that can result when a natural (or artificial) levee is breached, usually during a flood, in one location.

CONT

A crevasse splay is a geographical feature which forms when an overloaded stream breaks a natural or artificial levee and deposits sediment on a floodplain. This breach can cause large deposits that spread in a pattern similar to that of a river delta. In other words, coarser sediment is deposited first, close to the breach while finer sediment is carried farther to the edges of the crevasse splay. In cross section, the crevasse splay will result in graded deposits which may look like a Bouma sequence.

CONT

Crevasse splays are essentially small lobate deltas forming within the framework of the larger delta. They consist of relatively thin, lens-like masses of sediment, showing small-scale prograding coarsening-upward sequences ...

OBS

crevasse splay : term used at Natural Resources Canada-Earth Sciences Sector.

French

Domaine(s)
  • Géomorphologie et géomorphogénie
DEF

Corps silto-sableux provenant de l'épandage du matériel fluvio-deltaïque, s'étalant en bordure de chenal au travers de brèches entaillées dans les levées des chenaux distributaires, et formant des éventails dans l'embouchure des deltas.

CONT

Les faciès argileux sont interprétés comme des dépôts de plaine d'inondation soumise épisodiquement à des épandages de crevasses («crevasse splay») lors des crues, par rupture de levées.

OBS

crevasse évasée; crevasse divergente : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

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Record 2 2011-12-12

English

Subject field(s)
  • Geomorphology and Geomorphogeny
DEF

[The] sediments deposited to the side of a delta through a break in a river or distributary channel levee.

CONT

As the rivers flow through these flooded wetlands, they deposit extensive levee and crevasse splay sediments along the length of the valley... Tributaries flowing into the valley develop fluvial-fan deltas along the margins of the valley. As a result, the alluvial fill of these wide valleys consists of mixed coarsening upward deltaic and crevasse splay deposits interbedded with fining upward channel deposits as well as organic-rich shales and coals.

CONT

The third overbank deposit present within the study area is crevasse-splay sediment associated with the current Mississippi River channel.

OBS

crevasse-splay sediment : term used at Natural Resources Canada-Earth Sciences Sector.

French

Domaine(s)
  • Géomorphologie et géomorphogénie
OBS

dépôt de crevasse; dépôt alluvial de remplissage de crevasse : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 2

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