Riegel (glacial)

Riegel (glacial)

A riegel is a German term that describes traverse ridges of bedrock that have been exposed by glacial erosion. They are also known as rock bars, thresholds, and verrous. They are found in glaciated valleys, and are often associated with waterfalls and zones of rapids when streams are present. When multiple riegels are stacked in a series they are referred to as a glacial stairway.

Most riegels can be identified by having smooth faces on the up-valley sides, while the down-valley sides show signs of having been plucked (which means that it has been eroded by the removal of rocks and blocks from the bedrock).

References

* [http://www.proz.com/kudoz/1517782 www.proz.com, March 5th, 2007]
* [http://www.answers.com/topic/riegel www.answers.com, March 5th, 2007]


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