| glauconite | <chemical> The green mineral characteristic of the greensand of the chalk and other formations. It is a hydrous silicate of iron and potash. See Greensand. Origin: Cf. F. Glauconite, glauconie, fr. L. Glaucus. See Glaucous. Source: Websters Dictionary (01 Mar 1998) |
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| glauconite | a green mineral consisting of hydrated silicate of potassium or iron or magnesium or aluminum |
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