glauconite
a greenish micaceous mineral consisting essentially of a hydrous silicate of potassium, aluminum, and iron and occurring in greensand, clays, etc.
Origin of glauconite
1Other words from glauconite
- glau·co·nit·ic [glaw-kuh-nit-ik], /ˌglɔ kəˈnɪt ɪk/, adjective
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How to use glauconite in a sentence
The beds in this series vary a good deal lithologically, some being sandy, others marly or glauconitic; fossils are abundant.
The glauconitic grains of the Greensand formations are chiefly foraminiferal casts.
They appear in some cases to be altered limestones and in others altered glauconitic sandstones.
The Aptian rocks are generally clays, marls and green glauconitic sands with occasional limestones.
The sponge (Stauronema carteri) is characteristic of the Glauconitic Marl.
The Geological Story of the Isle of Wight | J. Cecil Hughes
British Dictionary definitions for glauconite
/ (ˈɡlɔːkəˌnaɪt) /
a green mineral consisting of the hydrated silicate of iron, potassium, aluminium, and magnesium: found in greensand and other similar rocks. Formula: (K,Na,Ca) 0.5-1 (Fe,Al,Mg) 2 (Si,Al) 4 O 10 (OH) 2 .nH 2 O
Origin of glauconite
1Derived forms of glauconite
- glauconitic (ˌɡlɔːkəˈnɪtɪk), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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