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CORRUGATED GROUND MORAINE [1 record]

Record 1 1991-04-12

English

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

A moraine perpendicular to the direction of ice flow, marking the position of old marginal lobes; it consists of a complex network of low, repetitive ridges which are irregularly branched and variable in length and width. The ridges of till give the surface a bumpy, rolling appearance emphasized by the presence of numerous ponds and depressions. A corrugated moraine differs from a Rogen moraine in size and form.

CONT

In the Interior Plains, low relief ground moraine commonly displays short to elongate, irregular-branching transverse ridges that ... impart a corrugated or washboard-like form and pattern to broad areas. ... The term corrugated ground moraine is proposed for these areas of repetitive transverse ridges ...

OBS

The composite pattern of the ridges [is] generally accentuated by the presence of innumerable ponds and sloughs ...

French

Domaine(s)
  • Géologie
  • Glaciologie
  • Géomorphologie et géomorphogénie
DEF

Moraine perpendiculaire à l'écoulement glaciaire, marquant la position d'anciens lobes marginaux; elle est constituée d'un réseau complexe de crêtes basses et répétitives à ramifications irrégulières, de longueur et de largeur variables. Les crêtes formées de till donnent à la surface une apparence bosselée et ondulée, accentuée par la présence de nombreux étangs et dépressions. Une moraine ondulée diffère d'une moraine de Rogen par ses dimensions et sa forme.

CONT

De vastes étendues des Prairies occidentales du Canada font voir une surface basse et onduleuse de crêtes glaciaires répétitives qui donnent à la surface une apparence généralement courbée et ondulée. Une telle moraine de fond ondulée marque clairement la position d'anciens lobes marginaux de l'inlandsis en retrait (...)

Spanish

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