Cold environments


Periglacial process            Periglacial landform

Solifluction                           solifluction lobe

Freeze thaw                        Scree slopes

Nivation                             Nivation hollow

Frost heave                         stone stripes and polygons

ground contraction               ice wedge polygons

Solifluction lobes - the active layer undergoes seasonal thawing. In summer when the active layer thaws the water cannot pentrate through the impermeable permafrost below and so the active layer becomes saturated. The actice layer begins to move own hill on any slope that is two degrees or higher

Nivation hollow - For a Nivation hollow to form there must be small hollow on a north/ north east facing slope. The N/NE facing slope allows thehollow to fill with snow because it is isolated from the sun's rays…


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