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Topic: Glauconite

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	Glauconite - Wikipedia, the free encyclopedia
		Normally, glauconite is considered diagnostic of continental shelf marine depositional environments with slow rates of accumulation.
		It develops as a consequence of diagenetic alteration of sedimentary deposits, changes in the biotite micas, for example, being influenced by the decaying process of the organic matter in animal shells.
		Glauconite forms under reducing conditions in sediments and such deposits are commonly found in nearshore sandstones, open oceans and the Mediterranean Sea but not in the Black Sea or in fresh-water lakes.
	en.wikipedia.org /wiki/Glauconite (343 words)

	Iconofile: Glauconite, Cold (Green Earth) [100 g jar] (3.5 oz.)
		Glauconite is a greenish mineral of hydrated iron potassium silicate containing small amounts of aluminum, calcium, magnesium, sodium, and numerous trace elements.
		The presence of celadonite or glauconite, minerals of complex silicate composition, produces colors that vary from cold bluish greens to warmer yellow and olive hues.
		In Russia, deposits of glauconite are found in the Moscow area; Lopatinskoye, Saratov; and in Bashkirya, Bayguzinskoye.
	www.iconofile.com /detail.asp?product_id=420:300100 (614 words)

	Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Glauconite
		Glauconite is a silicate mineral typically classified as a mica, although it exhibits many qualities that differ from other members of the group.
		The mineral glauconite, which characteristically appears some shade of green, derives its name from the Greek word glaukos, meaning “bluish-green.” Typically found in small grains referred to as pellets, the color of the substance is a consequence of its iron content and its other constituent elements.
		Glauconite can be precipitated directly from marine waters or may alternatively occur via a transformation of the organic wastes of bottom-dwellers or through the underwater modification of certain clays.
	www.olympusmicro.com /galleries/polarizedlight/pages/glauconitesmall.html (211 words)

	Natural Mineral Pigments: Glauconite (Green Earth)
		Glauconite is a greenish earth of hydrated iron potassium silicate, known as green earth or terre verte.
		Highly prized by icon painters, our cold glauconite is a cool dark green earth from the Baltic states.
		Glauconite is a greenish mineral of hydrated iron potassium silicate, known as green earth.
	www.iconofile.com /pigments_glauconite.asp (852 words)

	Glauconite: Glauconite mineral information and data.
		Slonimskaya, M.V., G. Besson, L.G. Daynyak, C. Tchoubar, and V.A. Drits (1986), The interpretation of the IR spectra of celadonites and glauconites in the region of OH-stretching frequencies: Clay Minerals: 21: 377-388.
		Dainyak, L.G., and V.A. Drits (1987), Interpretation of Mössbauer spectra of nontronite, celadonite, and glauconite: Clays and Clay Minerals: 35: 363-372.
		Drits, V.A., L.G. Dainyak, F. Muller, G. Besson, and A. Manceau (1997a), Isomorphous cation distribution in celadonites, glauconites and Fe-illites determined by infrared, Mössbauer and EXAFS spectroscopy: Clay Minerals: 32: 153-180.
	www.mindat.org /min-1710.html (541 words)

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