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The process of relief reduction or planation (i.e. the smoothing of the surface) under periglacial conditions. Two mechanisms are involved: the destruction of upstanding relief features by frost wedging or nivation, and the accumulation of debris in depressions or as terraces. In many areas only partial altiplanation has been achieved, with the emergence of altiplanation terraces, such as those of Cox Tor on Dartmoor, England.

Subjects: Ecology and Conservation — Earth Sciences and Geography.

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