This study assessed the environmental controls, active processes, and resulting landforms of geomorphological phenomena on Marian Island that have a high paleoclimatic indicator value as relict landforms in southern African mountain regions. The data set includes determination of temperature and moisture conditions during cold phases of the Pleistocene. Parameters include soil temperature (at +10 cm, -1 cm, -5 cm, -10 cm, -20 cm and -40 cm at one hour intervals) and sediment movement at four sites. This data set is at risk of being lost.