frozen ground or permafrost

kurum

a general term for all types of coarse clastic formations on slopes of 2-3 to 40 degrees, moving downslope mainly due to creep.

isolated talik

a layer or body of unfrozen ground entirely surrounded by perennially frozen ground.

isolated patches of permafrost

permafrost underlying less than 10% of the exposed land surface.

isolated cryopeg

a body of unfrozen ground, that is perennially cryotic (T < 0 degrees Celsius) and entirely surrounded by perennially frozen ground.

isoband cryogenic fabric

a distinct soil micromorphology, resulting from the effects of freezing and thawing processes, in which soil particles form subhorizontal layers of similar thickness.

intrusive ice

ice formed from water injected into soils or rocks.

intrapermafrost water

water occurring in unfrozen zones (taliks and cryopegs) within permafrost.

interstitial ice

ice formed in narrow spaces between small rocks and sediment in soil.

intermediate discontinuous permafrost

(1) (North American usage) permafrost underlying 35 - 65% of the area of exposed land surface (2) (Russian usage) permafrost underlying 40 - 60% of the area of exposed land surface.

interfacial water

water that forms transition layers at mineral/water and mineral/water/ice interfaces in frozen ground.

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