Permafrost refers to ground material such as rock or unconsolidated rock that has a permanent temperature of 0 °C or colder. In summer, the layer near the surface, known as the thaw layer, thaws. In Switzerland, permafrost covers around four percent of the country’s surface and mainly occurs at altitudes above 2,500 meters above sea level. There are two main types of permafrost in the mountains:

Ice-poor permafrost:
Occurs in high altitude rock faces where ice is only present in crevices and pores in the frozen rock.

Ice-rich permafrost:
Located at the base of steep slopes where material from snow avalanches and rockfall is deposited and forms an ice-rich bedrock over a period of years.

This study in the link focuses on rock glaciers.