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clay mineral |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.04 sec. |
clay mineralAny of a group of important hydrous aluminum silicates with a layered structure and very small (less than 0.005 mm or microscopic) particle size. They are usually the products of weathering. Clay minerals occur widely in such sedimentary rocks as mudstones and shales, in marine sediments, and in soils. Different geologic environments produce different clay minerals from the same parent rock. They are used in the petroleum industry (as drilling muds and as catalysts in refining) and in the processing of vegetable and mineral oils (as decolorizing agents). How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Green indicates clay minerals that formed in a wet environment. Na-4-mica is formed by combining kaolinite, a soft clay mineral used in the ceramics industry, with magnesium oxide in sodium fluoride at a temperature of 890[degrees]C. These resistivity lows are interpreted by URE consultants to be reflective of clay mineral alteration deep in the Thelon sandstones but above the unconformity contact. |
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