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- Gelisols abstract "Gelisols are an order in USDA soil taxonomy. They are soils of very cold climates which are defined as containing permafrost within two meters of the soil surface. The word "gelisol" comes from the Latin gelare meaning "to freeze", a reference to the process of cryoturbation that occurs from the alternating thawing and freezing characteristic of gelisols.In United Nations Food and Agriculture Organization soil classification system, Gelisols are known as cryosols.Structurally, gelisols have no B horizon and have an A horizon resting on the permafrost. Because soil organic matter accumulates in the upper layer, most gelisols are black or dark brown in soil color, followed by a shallow mineral layer. Despite the influence of glaciation in most areas where gelisols occur, chemically they are not highly fertile because nutrients, especially calcium and potassium, are very easily leached above the permafrost. The permafrost greatly restricts the engineering use of gelisols, as large structures (e.g. buildings) subside as the frozen earth thaws when they are put in place.Gelisols are found chiefly in Siberia, Alaska and Canada. Smaller areas are found in the Andes (mainly near the intersection between Chile, Bolivia and Argentina), Tibet, northern Scandinavia and the ice-free parts of Greenland and Antarctica. Fossil gelisols are known from as far back as Precambrian ice ages 900 million years ago.".
- Gelisols thumbnail Gelisol_profile.jpg?width=300.
- Gelisols wikiPageExternalLink gelisols.htm.
- Gelisols wikiPageExternalLink gelisols.htm.
- Gelisols wikiPageExternalLink Permafrost+Soils+and+Biogeochemistry.pdf.
- Gelisols wikiPageID "1519627".
- Gelisols wikiPageRevisionID "551760610".
- Gelisols classificationSystem USDA_soil_taxonomy.
- Gelisols climate Subarctic_climate.
- Gelisols climate Tundra.
- Gelisols hasPhotoCollection Gelisols.
- Gelisols imageCaption "a Gelisol profile".
- Gelisols imageSize "250".
- Gelisols name "Gelisol".
- Gelisols parentMaterial "peat, other".
- Gelisols process Cryoturbation.
- Gelisols profile "OAC".
- Gelisols subject Category:Arctic_geography_terminology.
- Gelisols subject Category:Pedology.
- Gelisols subject Category:Permafrost.
- Gelisols subject Category:Types_of_soil.
- Gelisols type Abstraction100002137.
- Gelisols type Attribute100024264.
- Gelisols type Condition113920835.
- Gelisols type Dirt114498096.
- Gelisols type Dirtiness114497763.
- Gelisols type SanitaryCondition114494716.
- Gelisols type State100024720.
- Gelisols comment "Gelisols are an order in USDA soil taxonomy. They are soils of very cold climates which are defined as containing permafrost within two meters of the soil surface.".
- Gelisols label "Cryosol".
- Gelisols label "Cryosol".
- Gelisols label "Cryosol".
- Gelisols label "Gelisol".
- Gelisols label "Gelisols".
- Gelisols label "Арктические почвы".
- Gelisols label "冻土".
- Gelisols sameAs Cryosol.
- Gelisols sameAs Cryosol.
- Gelisols sameAs Gelisol.
- Gelisols sameAs Cryosol.
- Gelisols sameAs m.057ksz.
- Gelisols sameAs Q389033.
- Gelisols sameAs Q389033.
- Gelisols sameAs Gelisols.
- Gelisols wasDerivedFrom Gelisols?oldid=551760610.
- Gelisols depiction Gelisol_profile.jpg.
- Gelisols isPrimaryTopicOf Gelisols.
