duricrust

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duricrust

(ˈdjʊərɪˌkrʌst)
n
(Geological Science) another name for caliche2
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Here the soil regolith and rock configuration is more complex with Cenozoic duricrusts (variably cemented palaeo-Shoalhaven River alluvium) forming resistant crestal landforms overlying deeply weathered, bedded and fractured metasedimentary rock.
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.
Duricrusts such as laterite, calcrete and gypcrete formas accumulative horizons within weathering profiles, and some silcretes may be of like origin though many are valley deposits that have been indurated by salts derived from river and groundwaters.
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.
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.