Describes geological materials rich in clay: shales for example. Not normally applied to soils, the roughly equivalent term in pedology being argillic, as in argillic horizon. Soils developed on argillaceous materials tend to be heavy, with clay minerals inherited or derived from sheet silicates in the parent rock. Where soils have developed on so-called “black” (i.e., organic-rich) shales, elements such as Cu, Mo, Ni, Zn, Cr, V, As and F, may be present in toxic amounts (e.g., Fang et al., 2001).
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Fang, W., Hu, R., and Wu, P., 2001. Influence of black shales on soils and edible plants in the Ankang Area, Shaanxi Province, P. R. of China. Environ. Geochem. Health, 24: 35–46.
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(2008). Argillaceous. In: Chesworth, W. (eds) Encyclopedia of Soil Science. Encyclopedia of Earth Sciences Series. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-3995-9_35
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DOI: https://doi.org/10.1007/978-1-4020-3995-9_35
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