A couloir is a narrow, steep-sided gully cut into a mountainside, forming as a seam, scar or fissure in the rock. Couloirs fill with snow and ice in winter, channeling both meltwater and avalanches, and their steep, well-defined lines make them popular routes for mountaineers and extreme skiers.
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Couloir (Wikipedia)
In Discipline: Geomorphology, Lead paragraphQuote, In Discipline: Geomorphology, Lead paragraph
A couloir (French: [ku.lwaŹ], "passage" or "corridor") is a narrow gully with a steep gradient in mountainous terrain.
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