Rock glaciers are a mixture of frozen rock detritus and ice of glacial or periglacial origin, forming a tongue-like mass which can flow very slowly under gravity found in regions extreme cold at high latitudes and altitudes in Europe. Ice-dominated moraines are masses of unconsolidated mineral debris found in the vicinity of retreating glaciers. Few organisms have the ability to colonize these particular habitats, because of the low temperatures and the mobility of the substrate so the flora is limited to pioneer plants and lichens, occurring principally on the lateral and terminal borders of the detritus. Invertebrates increase with the developing vegetation cover.

[This habitat could not be formally defined in the expert system because it is not based on vegetation.]