Frost-fissure polygon net comprises variable proportions and distributions of both ice and clastic sediments (Goździk 1973).
A network of subsurface wedges that are composed of a mixture of ice and sand or rubble. Ice and sand layers may alternate within a wedge (Berg and Black 1966). They can be distinguished from other composition wedges by the presence of accessory landforms, such as gullies.
Thermal-contraction cracks are tensile fractures produced by thermal stresses in ice-rich or ice-cemented permafrost (Lachenbruch 1962). These cracks may be filled by one of three materials or a combination thereof: (a) seasonal snowmelt that freezes in the autumn and forms ice veins in the cracks,...
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