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duricrust

[doo r-i-kruhst, dyoo r-] /ˈdʊər ɪˌkrʌst, ˈdyʊər-/
noun
1.
a hard crust that forms on or in soil in semiarid climates owing to cementation of soil particles.
Compare caliche, hardpan (defs 1, 2).
Origin
< Latin dūr(us) hard + -i- + crust
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for duricrust's

duricrust

/ˈdjʊərɪˌkrʌst/
noun
1.
another name for caliche (sense 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for duricrust's

duricrust

surface or near-surface of the Earth consisting of a hardened accumulation of silica (SiO2), alumina (Al2O3), and iron oxide (Fe2O3), in varying proportions. Admixtures of other substances commonly are present and duricrusts may be enriched with oxides of manganese or titanium within restricted areas. Thus, siliceous, ferruginous, and aluminous crusts constitute duricrusts proper. Encrusted layers of calcium carbonate, gypsum, and salt, however, are often considered forms of duricrust.

Learn more about duricrust with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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