glauconite
/glaw-kuh-nahyt/US // ˈglɔ kəˌnaɪt //UK // (ˈɡlɔːkəˌnaɪt) //
琉璃石,琉璃岩,青青石,白云石
Definitions
n.名词 noun
- 1
- : a greenish micaceous mineral consisting essentially of a hydrous silicate of potassium, aluminum, and iron and occurring in greensand, clays, etc.
Examples
A greenish mineral called glauconite—a silicate of iron and alumina—is then formed.
In a few places a red colour prevails, the iron being mostly oxidized; elsewhere the muds are green owing to abundant glauconite.
Red limestones usually contain haematite; in green limestones there may be glauconite or chlorite.
The sandstones are grey in colour, weathering buff or reddish-brown, tinged more or less green by grains of glauconite.
They are made of a mixture of sand and clay coloured dark green by a mineral called glauconite.
Level 4Browse all words →