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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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. The American Mineralogist 55, 925-933.
This magnetite was presumably formed on an exposed iron-rich duricrust surface from the Late Tertiary.
Outcrop throughout the project area is rare and occurs mostly as limonitic laterite duricrust; a total of 154 sample analyses have been received, 9% of samples contain greater than 40%Fe with a maximum value of 65.9%Fe, ranging from 0.9%Fe to 65.9%Fe.
Palygorskite occurs in the form of matrix-cements, binding together clastic particles and creating an indurated horizon which can be termed a duricrust. In analogy to calcrete duricrusts, the term palycrete can be accepted for this duricrust.
Duricrusts are among the most common surface phenomena known that affected ancient and modern landscapes.
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.
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.
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).