Mixing of soil horizons due to freezing and thawing.
Cut-away section of soil, showing movement of soil layers due to cryoturbation.
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.
As this process occurs, the upper soil material gradually dries out (because the soil moisture moves from the warm surface layer to the colder layer at the top of the permafrost) so that it forms a granular structure with many very distinctive crystalline shapes (such as ice lenses). Separation of coarse from fine soil materials produces distinctive patterned ground with different types of soil.
The extent of cryoturbation in gelisols varies considerably: it occurs much more on exposed sites (where turbels dominate everywhere) than in sheltered sites such as valleys (where orthels are not significantly affected by cryoturbation form).
In gelisols (permafrost soils), cryoturbation (frost churning) refers to the mixing of materials from various horizons of the soil down to the bedrock...
the Latin gelare meaning "to freeze", a reference to the process of cryoturbation that occurs from the alternating thawing and freezing characteristic...
of discontinuous permafrost, most conifers are able to grow easily. Cryoturbation is the dominant force operating in the active layer, and tends to make...
rate of subsurface freezing by raising the temperature of the ice. Cryoturbation Frost law Frost weathering Ice jacking Palsa In the section II. Fl....
either continuous or discontinuous permafrost, consequently affected by cryoturbation are common in high mountain plateaus of Tibet and the Andean altiplano...
S. ice-free land). Gelisols: Soils with permafrost within 100 cm or cryoturbation (frost churning) within 100 cm plus permafrost within 200 cm; commonly...
suggesting fluidity at some point in the past. The disturbance, a form of cryoturbation, often extends to a depth roughly equal to the hummock’s height. This...
as ice wedges, patterned ground, pingos, rock glaciers, palsas, soil cryoturbation, and solifluction deposits developed in unglaciated extra-Andean Patagonia...
accumulation of salts more soluble than gypsum—no restriction. @: Evidence of cryoturbation—no restriction. Numerical prefixes are used to denote lithic discontinuities...
continuous at higher elevations and overlaid with a thin active layer. Cryoturbation landforms were not conspicuous according to Nagy et al. 2019, presumably...
been formed during several periods of glaciation and was produced by cryoturbation and decalcification of the chalk. This hypothesis is supported by the...
in the inner honeycomb-shaped areas of this frost pattern terrain (cryoturbation) and are fed during the short summers with sufficient moisture, because...
process responsible for storing carbon is cryoturbation, the mixing of soil due to freeze-thaw cycles. Cryoturbation moves carbon from the surface to depths...
small circular mounds of fresh soil material formed by frost action and cryoturbation. They are found typically found in periglacial or alpine environments...
processes, such as cryoturbation and stone striping, occur on Level Mountain at elevations greater than 1,250 metres (4,100 feet). Cryoturbation takes place...
on the southern and 5,750 metres (18,860 ft) on the northern flank. Cryoturbation, gelifluction, patterned grounds, solifluction and other periglacial...
the ground undergoing processes of alternate freezing and thawing (cryoturbation), makes difficult the development of elevated brush. In their regressive...
and mixed horizons or other evidence of cryoturbation. Static Cryosols lack marked evidence of cryoturbation; they are associated with sandy or gravelly...
in permafrost exhibits a considerable spatial variability, and that cryoturbation contributes to the distribution of carbon within the soil. She combines...
conclusive answer regarding the relationships between the two, however cryoturbation structures were discovered on Hatfield Moor indicating the freezing...
behind. This mud freezes during the winter months to a certain depth and cryoturbation has formed polygonal structures as well as large cracks in the crust...
Monte is drained by the Desaguadero River. The lower limit of soil cryoturbation along the eastern slope of Andes marks the upper boundary of the High...
of the South Downs, derived from the solution, decalcification and cryoturbation of the underlying bedrock. Referred to as the Clay-with-flints Formation...
small bivalves that lived on seaweed. It has been much disturbed by cryoturbation (freezing and thawing) during the late Pleistocene ice age. Human remains...
like ice wedges, patterned ground, pingos, rock glaciers, palsas, soil cryoturbation, solifluction deposits during the Llanquihue glaciation. The coast of...
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