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POLYGON GROUND [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-09-14

English

Subject field(s)
  • Geomorphology and Geomorphogeny
CONT

Several ice wedges connected together create a pattern in the ground called an ice-wedge polygon.... A high-centred polygon develops when plant material eventually fills the central wetland area of a low-centred polygon. The flow of water is reversed. Instead of pooling in the centre of the polygon, water now runs off into the bordering troughs.

Key term(s)
  • high centred polygon
  • high centered polygon
  • high centre polygon
  • high-center polygon
  • high center polygon

French

Domaine(s)
  • Géomorphologie et géomorphogénie
CONT

Plusieurs coins de glace reliés créent dans le sol ce qu'on appelle un polygone. [...] Un polygone convexe se développe lorsque le matériau végétal finit par remplir la zone humide centrale d'un polygone concave. L'eau s'écoule en sens contraire : au lieu de s'accumuler au centre du polygone, elle se dirige maintenant dans les fossés adjacents.

Spanish

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Record 2 2011-09-14

English

Subject field(s)
  • Geomorphology and Geomorphogeny
CONT

Several ice wedges connected together create a pattern in the ground called an ice-wedge polygon. Low-centred polygons develop as ice wedges grow, pushing the adjacent ground upward to form a raised rim. When several ice wedges join together, an irregular polygon is created. The raised rim of this polygon tends to trap water, creating a pattern of small wetlands. Low-centred polygons occur where ice wedges are actively growing.

Key term(s)
  • low centred polygon
  • low centered polygon
  • low centre polygon
  • low-center polygon
  • low center polygon

French

Domaine(s)
  • Géomorphologie et géomorphogénie
CONT

Plusieurs coins de glace reliés créent dans le sol ce qu'on appelle un polygone. Les polygones concaves se forment au fur et à mesure que les coins se développent, et poussent le sol adjacent vers le haut pour créer un bord surélevé. Lorsque plusieurs coins de glace se réunissent, ils forment ensemble un polygone irrégulier dont le bord surélevé a tendance à retenir l'eau et à créer de petites zones humides. Les polygones concaves se développent lorsque les coins de glace continuent de prendre de l'ampleur.

Spanish

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Record 3 2011-08-30

English

Subject field(s)
  • Geomorphology and Geomorphogeny
OBS

polygon : A form of horizontal patterned ground whose mesh is tetragonal, pentagonal, or hexagonal. Its formation is favored by intensive frost action.

French

Domaine(s)
  • Géomorphologie et géomorphogénie

Spanish

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Record 4 2011-08-22

English

Subject field(s)
  • Geology
  • Geomorphology and Geomorphogeny
DEF

A large "nonsorted polygon" characterized by borders of intersecting ice wedges occupying fissures in permafrost regions and formed by contraction of frozen ground. The fissured borders delineating the polygon may be ridges... or shallow troughs..., and are generally underlain by irregular masses of wedge-shaped ice.

French

Domaine(s)
  • Géologie
  • Géomorphologie et géomorphogénie
DEF

Figure périglaciaire de dimensions variables (de quelques mètres à plus de cent mètres), dont le centre est relativement élevé ou déprimé.

Spanish

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Record 5 2011-02-07

English

Subject field(s)
  • Soil Science
  • Geomorphology and Geomorphogeny
DEF

A soil which is characterized by irregular (polygonal) prisms formed by intensive shrinkage of dispersed homogenous soil material.

OBS

This phenomenon may be observed both in torrid deserts and in the Arctic regions.

OBS

polygonal ground; polygonal soil; polygon ground; cellular soil : terms used at Natural Resources Canada-Earth Sciences Sector.

French

Domaine(s)
  • Science du sol
  • Géomorphologie et géomorphogénie
DEF

Sol typique des régions périglaciaires, et qui présente en plan des polygones, de quelques centimètres à quelques décimètres de côté, dessinés par des accumulations de débris rocheux ou par la végétation.

OBS

sol polygonal; terrain réticulé : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 5

Record 6 2008-09-22

English

Subject field(s)
  • Geomorphology and Geomorphogeny
DEF

A polygon outlined by sand wedges underlying its boundaries.

CONT

Sand-wedge polygons(tesselations) in the McMurdo Sound region, Antarctica...-A microrelief pattern of polygons 20 to 40 feet in diameter occurs in the perennially frozen ground of the glacierfree lowlands of the McMurdo Sound region... They are similar to ice-wedge polygons in the Arctic except that they are in ground devoid of vegetation and are outlined by textural changes in the soil between the inter-polygonal furrow and the enclosed polygonal areas. The term 'sand wedge’ polygon is here proposed for this widespread phenomenon.... Suggested origin of the polygons and sand wedges is similar to the origin of foliated ice wedges and polygons in the Arctic.

CONT

Much of the surface in the area now occupied by McMurdo Station was originally covered by sand-wedge polygons, which are ubiquitous periglacial features across the ice-free lowlands of McMurdo Sound.

OBS

sand wedge polygon: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Géomorphologie et géomorphogénie
CONT

Quant aux drumlins et autres dépôts de moraine de fond, ils sont affectés par un réseau de polygones à coins sableux.

OBS

polygone de coin de sable : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 6

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