Riegel
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riegel
[′rē·gəl] (geology)
A low, traverse ridge of bedrock on the floor of a glacial valley. Also known as rock bar; threshold; verrou.
Riegel
a transverse ridge of bedrock on the floor of a glacial valley. A riegel forms when hard rock outcrops on the surface of the valley floor or when the valley is overdeepened by intensified glacial activity.