Photoglossary

Riegel

(from the German) A rock barrier that extends across a glaciated valley, usually comprising harder rock than above and below, and commonly having a smooth up-valley facing slope and a rough down-valley facing slope.

Riegel in the proglacial area of Triftgletscher, Bernese Alps, Switzerland. The riegel dams the lake but has been dissected by the meltwater stream. Photo J. Alean.

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