Abstract
The paper presents a brief review of contemporary knowledge concerning the development of cryoplanation terraces and their genetic equivalents—the cryoplanation summit flats. It is based mainly on results from Yakutia, where under present-day and Pleistocene permafrost conditions, these features are broadly distributed in upland and low mountain areas. The author shares the opinion of the majority of geomorphologists that, in the formation of cryoplanation terraces, processes of the parallel retreat of steeper slope segments were of main significance. The down-wearing of the surface appears to be an accompanying process. However, for better understanding of this serious problem long-term monitoring and measuring of the rate and the nature of slope processes on frost-riven cliffs and scarps as well as on the terrace treads in various physico-geographical and geological environments are necessary.
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