duricrust
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Duricrust — is a hard layer on or near the surface of soil. Duricrusts can range in thickness from a few millimeters or centimeters to several meters. It is a general term (not to be confused with duripan) for a zone of chemical precipitation and hardening… … 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
duricrust — [ djʊərɪkrʌst] noun Geology a hard mineral crust formed at or near the surface of soil in semi arid regions by the evaporation of groundwater. Origin 1920s: from L. durus hard + crust … English new terms dictionary
duricrust — du·ri·crust … English syllables
duricrust — ˈd(y)u̇rəˌkrəst noun Etymology: Latin durus hard + English i + crust more at dure : a hard crust formed at or near the surface of the ground as a result of the upward migration and evaporation of mineral bearing ground water compare caliche … Useful english dictionary
Western Africa — ▪ region, Africa Introduction region lying south of the Sahara and east and north of the Atlantic Ocean. It is latitudinally divided into two parallel belts of land: the western portion of the Sudan, a geographic area that stretches across… … Universalium
Ultramafic rock — Ultramafic (also referred to as ultrabasic) rocks are igneous and meta igneous rocks with very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are composed of usually greater than 90% mafic minerals (dark… … Wikipedia
Caliche (mineral) — Caliche is a hardened deposit of calcium carbonate. This calcium carbonate cements together other materials, including gravel, sand, clay, and silt. It is found in aridisol and mollisol soil orders. Caliche occurs worldwide, generally in arid or… … Wikipedia
Afforestation — is the process of establishing a forest on land that is not a forest, or has not been a forest for a long time by planting trees or their seeds. The term may also be applied to the legal conversion of land into the status of royal forest.The term … Wikipedia
North Province (Cameroon) — Geobox|Province name = North Province country = Cameroon country capital = Garoua map caption = Location of North Province within Cameroon coordinates type = adm1st lat d = 8 |lat m = 30 |lat NS = N long d = 14 |long m = 00 |long EW = E area =… … Wikipedia
