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 ?
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.
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.
Similarly, the widely occurring Fe nodules and duricrusts in coastal eastern Australia have been described as eroded remnants of laterite duricrusts (e.
Faniran A (1970) Maghemite in the Sydney duricrusts.
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.
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).
Duricrusts are among the most common surface phenomena known that affected ancient and modern landscapes.
Continentally formed duricrusts have frequently been reported from Spain.
In analogy to calcrete duricrusts, the term palycrete can be accepted for this duricrust.