Accession Number : AD0711879

Title :   ON THE MECHANISM OF NIVAL PROCESSES,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Lyubimov,B. P.

Report Date : 1970

Pagination or Media Count : 15

Abstract : The 'nivation' concept ('nivation' from the Latin root 'nix' = snow) is understood as the geomorphological process of the formation of corrie-like recesses on the slopes in the places of occurrence of firns as a result of the disruption of rocks along the edges of the firns under the effect of physical erosion and the subsequent removal of the material with the aid of fine streams of meltwater. The first combines the processes of disruption in continuity of the rocks and the active preparation of the material for displacement. The first group includes the following processes: (1) microclimatic: the development of a low-temperature zone under the firn, with the retention of a layer of seasonally frozen ground and the upheaval of the cover of ever-frozen rocks. The second group of the processes combines the processes of transporting and depositing the material; as a result, we have the formation of nival deposits and nival relief forms. (Author)

Descriptors :   (*SNOW, *EROSION), FREEZING, PERMAFROST, MELTING, DEPOSITS, PENETRATION, FROST HEAVE, ROCK, TRANSPORT PROPERTIES, TERRAIN, USSR

Subject Categories : Geology, Geochemistry and Mineralogy
      Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE