Where is glauconite found

Glauconite pellets in a beach sand from France. Width of view 20 mm. Glauconite is usually a component of sandstones. It occurs in sand-sized granules in marine sandstones. If abundant, it gives distinct green color to sandstones that are called greenbeds or greensands. It may also occur in carbonate rocks.

My home country Estonia has both glauconitic sandstone and glauconitic limestone layer limestone on top of the sandstone. Glauconite may be abundant component of beach sand if greenbeds are exposed in a coastal cliff. Keep logged in. Cookies deactivated. To use all functions of this page, please activate cookies in your browser. Login Register. Home Encyclopedia Glauconite Glauconite.

Additional recommended knowledge. Topics A-Z. All topics. To top. About chemeurope. Colorimetry-Software Day Free Trial. Many of the blue muds, which owe their colour to fine particles of sulphide of iron, contain also a small quantity of glauconite; in Globigerina oozes this substance has also been found, and in fact there exists every gradation between the glauconitic deposits and the other types of sands and muds which are found at similar depths. The colouring matter is believed in every case to be glauconite.

Other ingredients, such as lime, alumina and magnesia are usually shown to be present by the analyses, but may perhaps be regarded as non-essential: it is impossible to isolate this substance in a pure state as it occurs only in fine aggregates, mixed with other minerals. The glauconite, though crystalline, never occurs well crystallized but only as dense clusters of very minute particles which react feebly on polarized light.

They have one well-marked characteristic inasmuch as they often form rounded lumps. In many cases it is certain that these are casts, which fill up the interior of empty shells of Foraminifera. Clays and Clay Minerals, 61, — Nature Geosciences, 8, — Chemical Geology, , 21— Barker, P. Bauluz, B. Nieto and F. Livi, Eds. EMU notes in Mineralogy.

Clays and Clay Minerals, 48, — Buatier, M. Clays and Clay Minerals, 37, — Burst, J. American Mineralogist, 43, — Chamley, H.

Charpentier, D. Geochimica et Cosmochimica Acta, 75, — Coren, F. Journal of the Geological Society of London, , — Deb, S. The Journal of Geology, , — Drief, A. Implications for the smectite-illite transformation. Clay Minerals, 35, — Duplay, J. Chemical Geology, 84, — Eder, V. Sedimentology, 54, — Ehlmann, A. Journal of Sedimentary Petrology, 33, 87— Southwestern of the Iberian Peninsula. Elsen, P.

Grobet, M. Keung, H. Leeman, R. Schoonheydt, and H. Toufar, Eds. Galliher, E. Geological Society of America Bulletin, 46, —