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argillitetype of sedimentary rock made of clay.
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argilliteA compact metamorphic rock composed mainly of clay or shale, and aluminum silicate minerals. Similar to slate in appearance and splitting properties, but usually much harder.
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argillite(n) a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages
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argilliteName used for unusually hard, fine-grained sedimentary rocks, such as shale
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argilliteArgillite is a fine-grained sedimentary stone composed of clay particles. Argillite is lithified mud and poorly-lithified argillite can be called mudstone. Metamorphism of argillites produces slate.
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argilliteA compact sedimentary rock composed mainly of clay and aluminum silicate minerals.
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argillitename used for unusually hard, fine-grained sedimentary rocks, such as shale, mudstone, siltstone, and claystone. Commonly black.
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argillitefine-grained sedimentary rock consisting mostly of hardened clay particles
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argilliteFine-grained (clay, silt) sedimentary rock.
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argillite<chemical> Argillaceous schist or slate; clay slate. Its colours is bluish or blackish gray, sometimes greenish gray, brownish red, etc. Argillit"ic. Origin: Gr. Clay. (01 Mar 1998)
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