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MICRORELIEF [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2018-02-23

English

Subject field(s)
  • Geomorphology and Geomorphogeny
  • Hydrology and Hydrography
CONT

Slope marshes develop on lower elevation slopes where water-bearing strata and impermeable layers contact the ground surface. Slope marshes occupy wet seepage areas where groundwater discharges. The slope marsh is characterized by hummocky microrelief, soggy, saturated ground and flushes.

French

Domaine(s)
  • Géomorphologie et géomorphogénie
  • Hydrologie et hydrographie
CONT

Les marais inclinés se forment sur des pentes peu élevées où une strate aquifère et des couches imperméables sont en contact avec la surface du sol. Les marais inclinés se trouvent dans des régions de drainage oblique avec écoulements d'eau souterraine. Ils se caractérisent par le microrelief de butte, un sol saturé et détrempé, et des pousses.

Spanish

Save record 1

Record 2 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 2

Record 3 2008-01-10

English

Subject field(s)
  • Ecology (General)
  • Environment
CONT

The composition of the many halophytic herbaceous communities that colonize the upper level of the shoreline varies not only with submersion rate but also with microrelief, soil texture, and soil salinity.

French

Domaine(s)
  • Écologie (Généralités)
  • Environnement
CONT

Ces marais sont communément qualifiés d'«herbaçaies salées» en raison du grand nombre de communautés végétales herbacées qui colonisent le niveau supérieur du rivage et dont la composition varie non seulement en fonction du taux de submersion qu'elles subissent, mais aussi du micro-relief, de la texture et de la salinité du sol.

Spanish

Save record 3

Record 4 2000-12-21

English

Subject field(s)
  • Physical Geography (General)
  • Structural Testing (Materials)
  • Landscape Architecture
DEF

A term applied to surface irregularities only when it is necessary to distinguish them from microrelief.

CONT

At the regional scale, landform may include such diverse types as valleys, mountains, rolling hills, prairies, and plains. These landform types are typically referred to as "macrolandforms".

OBS

Macrolandform: valley, mountain, rolling hill, prairie, plain. Microlandform: mound, berm, slope, level area, elevation changes via steps and ramps. Minilandform: ripple of a sand dune, textural variation of stones and rocks.

French

Domaine(s)
  • Géographie physique (Généralités)
  • Contrôle structural des matériaux
  • Architecture paysagère
OBS

Microrelief : relief de petite dimension (entre un décimètre et un mètre de hauteur relative).

Spanish

Save record 4

Record 5 2000-06-20

English

Subject field(s)
  • Ecosystems
CONT

The composition of the many halophytic herbaceous communities that colonize the upper level of the shoreline varies not only with submersion rate but also with microrelief, soil texture, and soil salinity.

French

Domaine(s)
  • Écosystèmes
CONT

Ces marais sont communément qualifiés d'«herbaçaies salées» en raison du grand nombre de communautés végétales herbacées qui colonisent le niveau supérieur du rivage et dont la composition varie non seulement en fonction du taux de submersion qu'elles subissent, mais aussi du micro-relief, de la texture et de la salinité du sol.

Spanish

Save record 5

Record 6 1999-09-22

English

Subject field(s)
  • Soil Science
DEF

The microrelief of soils produced by expansion and contraction caused by changes in moisture.

CONT

Gilgai is found in soils that contain large amounts of clay, which swells and shrinks noticeably with wetting and drying. It usually occurs as a succession of microbasins and microknolls in nearly level areas or as microvalleys and microridges parallel to the direction of the slope.

French

Domaine(s)
  • Science du sol
DEF

Microrelief des sols produit par le gonflement et la contraction, dus à des variations de l'humidité.

CONT

On rencontre des gilgaï dans les sols riches en argile, qui gonfle et se contracte de façon notable sous l'effet de l'humidification ou de la dessiccation. Ils se présentent généralement comme une alternance de microcuvettes et de microbuttes dans les terrains presque plans, ou de microvallées et de microcollines parallèles à la pente du terrain.

Spanish

Save record 6

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