duricrust


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duricrust

[′du̇r·ə‚krəst]
(geology)
The case-hardened soil crust formed in semiarid climates by precipitation of salts; contains aluminous, ferruginous, siliceous, and calcareous material.
References in periodicals archive ?
1977) to show that Fe nodules in south-eastern Australia form by contemporary weathering and erosion of Fe-rich sandstone units, ferruginous duricrust, or iron-rich soil mottles and bear only a superficial resemblance to laterite.
Faniran A (1970) Maghemite in the Sydney duricrusts.
This magnetite was presumably formed on an exposed iron-rich duricrust surface from the Late Tertiary.
Palygorskite occurs in the form of matrix-cements, binding together clastic particles and creating an indurated horizon which can be termed a duricrust.
Duricrusts are among the most common surface phenomena known that affected ancient and modern landscapes.
Palaeoenvironmental Reconstructions, Libya (HSBC) 1 To examine the distribution and stratigraphy of duricrusts from different palaeohydrological settings in the Murzuk, southern Libya
For instance, the international literature records terms such as laterite, petroferric contact, ferricrete, cuirasse, duricrusts, iron crusts, ironstones, ironpans, pisoliths, pisoplinthite, iron concretions and nodules.
Of potential relevance to the WA wheatbelt situation is widespread active silicification in shallow calcrete aquifers documented from central Australia by English (2001, 2002), a case of contemporary primary salinity rather than palimpsest duricrusts or secondary processes caused by land clearing.
En el capitulo 3 ("Surfaces and their ages") se analiza el significado de los terminos "edad" y "superficie" en geomorfologia y se hace un estudio de las distintas formas de duricrusts que se encuentran en Australia, discutiendose sus posibles edades.
Sauer D, Stein C, Glatzel S, Kuhn J, Zarei M, Stahr K (2015) Duricrusts in soils of the Alentejo (southern Portugal)--types, distribution, genesis and time of their formation.
2000) of catenary sequences of soil profiles describe upper slopes with typical lateritic soil profiles (Oxisols or Ferralsols) that have originated from the alteration of lateritic duricrusts developed from underlying sedimentary rocks (sandstones, mudstones, and siltstones from the Mesozoic Upper Bauru Group).