plinthite

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• Plinthite — (from the Greek plinthos , brick) is an iron rich, humus poor mixture of clay with quartz and other minerals.Plinthite is a redoximophic feature in highly weathered soil. The product of pedogenesis, it commonly occurs as dark red redox… …   Wikipedia

• plinthite — (plin ti t ) s. f. Minéral à texture compacte et terreuse, d un rouge de brique, formé principalement de silice, d alumine et de peroxyde de fer, que l on trouve dans le comté d Antrim, en lrlande. ÉTYMOLOGIE    Terme grec signifiant brique, à… …   Dictionnaire de la Langue Française d'Émile Littré

• Plinthosol — ▪ FAO soil group  one of the 30 soil groups in the classification system of the Food and Agriculture Organization (FAO) (soil). Plinthosols form under a variety of climatic and topographic conditions. They are defined by a subsurface layer… …   Universalium

• Tifton (soil) — Tifton soil is the official state soil of the state of Georgia. Profile A typical Tifton soil profile consists of an 11 inches (280 mm) topsoil of dark grayish brown loamy sand. The subsoil extends to about 65 inches, strong brown fine… …   Wikipedia

• duricrust — /door i krust , dyoor /, n. a hard crust that forms on or in soil in semiarid climates owing to cementation of soil particles. Cf. caliche, hardpan (defs. 1, 2). [ < L dur(us) hard + I + CRUST] * * * ▪ geology Introduction       surface or near… …   Universalium

• Soil Horizon letter designations — ▪ Table Soil horizon letter designations See as table: Base symbols for surface horizons O organic horizon containing litter and decomposed organic matter A mineral horizon darkened by humus accumulation       Base symbols for subsurface horizons …   Universalium

• 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