Delimitation of geocryogenic (periglacial) regions and associated geomorphic belts at 33° S.L. Andes of Mendoza, Argentina
DOI:
https://doi.org/10.26485/BP/1986/31/5Keywords:
permafrost, rock glaciers, geocryogenic belts, Cordillera de los AndesAbstract
The geocryogenic (periglacial) belts in the Cordillera de los Andes at 33° S.L. are defined. The permafrost region is located above 3200 m; within this belt two sub-regions are distinguished: the zone of active layer, above permafrost on rock glaciers, from 3200 till 5000 m with a mean annual air temperature from 0°C to -10°C. The upper zone of intense freezing, permafrost widespread, over 5000 m with a mean annual air temperature below -10°C. The lowest belt, the parageocryogenic belt (paraperiglacial) is located below the lowest terminus of rock glaciers (sporadic permafrost) or the mean annual air temperature of 0°C. The lowermost boundary of the parageocryogenic belt is located where needle-ice ceases to up-root vegetation.
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