glauconite

How To Use glauconite In A Sentence

• Various potassium silicates -- leucite, feldspar, sericite, and glauconite -- and the potassium sulphate, alunite, have received attention and certain of them have been utilized to a small extent, but none of them are normally able to compete on the market. The Economic Aspect of Geology
• Iron likewise combines with a considerable variety of substances other than oxygen; and some of these compounds, as for instance iron carbonate (siderite), iron silicate (chamosite, glauconite, etc.), and iron sulphide (pyrite), are locally mined as iron ores. The Economic Aspect of Geology
• Another source of slowly available potash is the clay-type mineral glauconite, commonly sold as greensand.
• Greenish sands hold chlorite-glauconite or olivine, also called peridot, when it is of gem-like quality. Wired Top Stories
• Fossiliferous, thin marine shales, associated with biochemical precipitates such as glauconite and phosphorite, are common in transgressive systems tracts.
• The magnesia and potash are, also, largely restored from the ocean; the former in dolomites and magnesian limestones; the latter in glauconite sands. The Birth-Time of the World and Other Scientific Essays
• Paleocene fossil outcrops abound in the glauconite rich gray clay substrata of the creek banks exposed beneath the deep rich surface soils.
• The lower Cubagua Formation consists of gray shale with glauconite, abundant pyrite nodules, gray limonite, and some sandy intercalation with fine clastics probably carried out by turbidity currents.
• A series of worm-holes traced erratic hieroglyphics across a scaling corner; all the varied texts were illuminated by quartzose particles glittering in the sun, and here and there fine green grains of glauconite. The Riddle Of The Rocks 1895
• In addition, colors that can be produced by using mixtures of the just-mentioned basic pigments, in some cases along with glauconite and charred bone, are also noted and illustrated.