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rock glacier

a mass of rock resembling a valley glacier that moves or is moved down a slope by its own weight or by the action of frost and interstitial ice.
Origin of rock glacier
First recorded in 1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for rock glacier
Historical Examples
  • The last half-mile of the Nisqually Glacier has the appearance more of a rock glacier than an ice glacier.

    Your National Parks Enos A. Mills
  • This slide had been temporarily changed into a rock glacier—a slow, down-sliding mass of confused broken rocks.

    Watched by Wild Animals Enos A. Mills

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