- The upper limit of permafrost .
A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
Look at other dictionaries:
permafrost table — the variable surface constituting the upper limit of permafrost. Cf. frostline (def. 2). * * * … Universalium
permafrost table — the variable surface constituting the upper limit of permafrost. Cf. frostline (def. 2) … Useful english dictionary
permafrost — /perr meuh frawst , frost /, n. (in arctic or subarctic regions) perennially frozen subsoil. Also called pergelisol. [1943; PERMA(NENT) + FROST] * * * Perennially frozen earth, with a temperature below 32 °F (0 °C) continuously for two years or… … Universalium
Permafrost — This article is about frozen ground. For other uses, see Permafrost (disambiguation). In geology, permafrost, cryotic soil or permafrost soil is soil at or below the freezing point of water (0 °C or 32 °F) for two or more years. Ice is not always … Wikipedia
Gelisols — Gelisol a Gelisol profile Used in: USDA soil taxonomy Profile: OAC … Wikipedia
Frost boil — Mud boils near Lapporten, Sweden Frost boils (also known as mud boils, frost scars and mud circles ) are upwellings of mud that occur through frost heave and cryoturbation in permafrost areas, such as arctic and alpine regions. They are… … Wikipedia
Cryoturbation — Asphalt damaged by cryoturbation, or freezing of groundwater In gelisols (permafrost soils), cryoturbation (frost churning) refers to the mixing of materials from various horizons of the soil right down to the bedrock due to freezing and thawing … Wikipedia
frostline — /frawst luyn , frost /, n. 1. the maximum depth at which soil is frozen. 2. the lower limit of permafrost. Cf. permafrost table. [1860 65, Amer.; FROST + LINE1] * * * … Universalium
frostline — /frawst luyn , frost /, n. 1. the maximum depth at which soil is frozen. 2. the lower limit of permafrost. Cf. permafrost table. [1860 65, Amer.; FROST + LINE1] … Useful english dictionary
FAO Soil Classification System — ▪ Table Soil classification system of the Food and Agriculture Organization soil group abbrevi ation defining characteristics name derivation percent of Earth s land area See as table: Soils defined by parent material Andosol AN volcanic… … Universalium