Encyclopedia of Soil Science

2008 Edition
| Editors: Ward Chesworth


Reference work entry
DOI: https://doi.org/10.1007/978-1-4020-3995-9_145

The microscopic, surface layer or skin lining a void or mineral particle in a soil. Different varieties are named in terms of their chemical or mineralogical composition: argillans are cutans composed of clay minerals, ferrans are composed of iron hydroxides or oxides, ferri‐argillans are a mixture of iron hydroxides and oxides with clays, gypsans are composed of gypsum, organans are composed of organic matter, sesquans are composed of hydroxides of trivalent cations (Al and Fe in particular), matrans contain skeleton grains within the cutan material, skeletans are made up of skeleton grains adhering to the invested surface.


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© Springer 2008