See fig. 2 on this page:

Periglacial processes:
"Weathering: Detritus in periglacial environments is characterized by large quantities of angular, fractured rock resulting from the fracturing by freezing and thawing of interstitial water. Figure 2 shows slopes in South Victoria Land, Antarctica, where the mean temperature is -20 degrees Celsius, no soil develops on the steep taluses, and fractured, angular debris is present.
"European geologists have long been aware that thick sheets of poorly sorted angular debris mantled their landscape beyond the limits of glaciation. The process of fluid motion of sheets of debris down gentle slopes to form deposits is solifluction. Gelifluction refers specifically to flow of the active layer (not permafrost) over a frozen substrate. Meltwater saturation greatly promotes gelifluction and enables it occur on miniscule gradients."
http://geomorphology.geo.arizona.edu//geos450/LECTURE23/lecture23.html

Figure 2 is an image of the Dry Valleys. In fact that white deposit at the bottom might be Don Juan Pond.
In the links I gave of Don Juan Pond, some of the dark areas on the slopes are shadows but some are clearly debris flows, especially the ones with digitate ends.

Bob C.