Stratified slope deposits or grèzes litées (original French name) are accumulations of debris that are traditionally associated with periglaciation but that can also form in other settings.
Periglacial stratified slope deposits are thought to be the result of rock fragmented by frost being accumulated downslope.
[1] A distinction can be made between stratified slope deposits formed in screes and those of grèzes litées type.
Yet more processes contribute to the formation, but that are of lesser importance, include overland flow of water caused by rain and the combined action of snow and wind.
[1] The reason for the occurrence of stratified slope deposits outside present or past periglacial areas is that many of the processes that lead to their formation are azonal.