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Natural stone circles caused by cryoturbation (aka frost churning), Arctic desert habitat, Palanderbukta (Palander Bay) Zeipelodden, Nordaustlandet, Svalbard, Norway
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Natural stone circles caused by cryoturbation (aka frost churning), Arctic desert habitat, Palanderbukta (Palander Bay) Zeipelodden, Nordaustlandet, Svalbard, Norway
In gelisols (permafrost soils), cryoturbation (frost churning) refers to the mixing of materials from various horizons of the soil down to the bedrock due to freezing and thawing. Cryoturbation occurs to varying degrees in most gelisols. The cause of cryoturbation lies in the way in which the repeated freezing of the soil during autumn causes the formation of ice wedges at the most easily erodible parts of the parent rock. If the parent rock is hard, this can cause quite deep erosion of the rock over many years. As this process continues, during the summer when an active layer forms in the soil this eroded material can easily move both from the soil surface downward and from the permafrost table upward
Danita Delimont
Media ID 18247091
© Cindy Miller Hopkins/Danita Delimont
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