Аннотация:Catastrophic slope failures that occur in glaciated zones of mountainranges at high altitudes can be considered as landslides in cold regions, since iceplays an important role in their origination and emplacement. Case studies of theXX Century rock avalanche that fell onto the glacier and of the extraordinaryprehistoric ice-rock avalanche are described briefly. They demonstrate that presenceof large quantities of ice in the glaciated zones of high mountains results insignificant masking of the origin of debris accumulations that could be found eitheron glaciers or at the feet of heavily glaciated slopes.