更多glauconite例句

1. A greenish mineral called glauconite—a silicate of iron and alumina—is then formed.
2. In a few places a red colour prevails, the iron being mostly oxidized; elsewhere the muds are green owing to abundant glauconite.
3. Red limestones usually contain haematite; in green limestones there may be glauconite or chlorite.
4. The sandstones are grey in colour, weathering buff or reddish-brown, tinged more or less green by grains of glauconite.
5. They are made of a mixture of sand and clay coloured dark green by a mineral called glauconite.