L'illuviation (ou éluvation) est l'accumulation progressive dans une couche du sol (ou horizon) de diverses substances déposées par l'infiltration des eaux (percolation).
Habituellement, l'argile, le fer, l'humus se lessivent et forment des lignes de cohérence et de couleur différentes. Ces lignes sont importantes pour l'étude de la composition et l'âge des strates rocheuses.
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éluviation — ● éluviation nom féminin (latin eluvies, eau qui coule) Dans le sol, phénomène d entraînement généralement vertical, mais aussi oblique, de matières à l état soluble ou de suspensions. éluviation [elyvjɑsjɔ̃] n. f. ÉTYM. Mil. XXe; de eluvium, d… … Encyclopédie Universelle
eluviation — ☆ eluviation [ē lo͞o΄vē ā′shən, ilo͞o΄vē ā′shən ] n. [see ELUVIUM & ATION] the movement of various dissolved or suspended chemicals, minerals, etc. downward through the soil due to the movement of ground water … English World dictionary
eluviation — noun Etymology: eluvial of eluviation (from e + luvial as in alluvial) + ation Date: 1899 the transportation of dissolved or suspended material within the soil by the movement of water when rainfall exceeds evaporation • eluvial adjective •… … New Collegiate Dictionary
eluviation — /i looh vee ay sheuhn/, n. the movement through the soil of materials brought into suspension or dissolved by the action of water. [1925 30; ELUVIATE + ION] * * * Removal of dissolved or suspended material from a layer or layers of the soil by… … Universalium
eluviation — išplovimas statusas T sritis ekologija ir aplinkotyra apibrėžtis Tekančio arba prasisunkiančio vandens sukeltas grunto dalelių išnešimas: smulkios grunto dalelės atskiriamos nuo vandentėkmės vagos dugno ir krantų, pylimų ar kitų gruntinių… … Ekologijos terminų aiškinamasis žodynas
eluviation — noun a) The sideways or downward movement of dissolved or suspended material within soil caused by rainfall b) Creation of geological deposits (eluvial deposits) by in situ weathering or weathering plus gravitational movement or accumu … Wiktionary
eluviation — removal of material from a soil horizon, usually downward … Geography glossary
eluviation — elu·vi·a·tion … English syllables
eluviation — e•lu•vi•a•tion [[t]ɪˌlu viˈeɪ ʃən[/t]] n. gel the movement through the soil of materials brought into suspension or dissolved by the action of water • Etymology: 1925–30 … From formal English to slang
eluviation — /əˈluvieɪʃən/ (say uh loohveeayshuhn), /i / (say ee ) noun the removal of material in solution or suspension from the uppermost horizon of a soil to a lower horizon by the downward percolation of water. {eluvi(um) + ation} …
