These landforms are created by earth flow ("solifluction"). Weathered particles are moved downslope by creep, solifluction and rill wash. The podzols often occur on deep periglacial solifluction deposits down to . The Devil's Dyke V-shaped dry valley is the result of solifluction and river erosion. They everywhere occur in association with poorly sorted, clay-rich solifluction deposits. Cryoturbation, gelifluction, patterned grounds, solifluction and other periglacial landforms are noticeable at over elevation. Among the most common are block fields and solifluction lobes. Plants are subject to solifluction, where needle ice is produced every night in wetter soils. Cryoplanation and solifluction landforms are also observed on Iris and Mitral. Extensive periglacial phenomena, such as solifluction fields, are still active at higher elevations. Other common features include cambering, valley bulging and solifluction lobes. A common feature in solifluction deposits is the orientation of clasts parallel to the slope. During the ice ages, there were gradual solifluction on the slopes and also wind abrasion. During the short summer season all the slopes are prone to solifluction. There, solifluction and cryoplanation surfaces are developed, including lobe-shaped ground and block ramparts.