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skos:definition
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% or g Kg-1
(en)
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A loose, earthy, extremely fine-grained, natural sediment or soft rock composed primarily of clay-size or colloidal particles and characterized by high plasticity and by a considerable content of clay mineral and subordinate amounts of finely divided quartz, decomposed feldspar, carbonates, ferruginous matter, and other impurities; it forms a plastic, moldable mass when finely ground and mixed with water, retains its shape on drying, and becomes firm, rocklike and permanently hard on heating or firing.
(en)
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<http://opendata.inra.fr/anaeeThes/i_def_bbef1283-fe4e-490e-9487-c29902dde208>
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<http://opendata.inra.fr/anaeeThes/i_def_c2_2587>
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