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
• Keller et al. (2004a,b) demonstrated that the impact breccia and the K-T boundary are separated by a 50 cm interval of sediments that contain (1) five thin glauconite clay layers, each of which represents deposition over tens of thousands of years, thus incompatible with tsunami or backwash deposition? Should Keller's Thin Sections Be Independently Tested? « Climate Audit
• From that point upstream the sub-soil was composed of laminated greensand, that is, clay containing glauconite interspersed with discrete bands of fine-grained sand.
• Glauconite is close in composition to muscovite but has some iron, magnesium, sodium, and calcium.
• At the base of the Reading Formation are several metres of brown clay-rich sand with glauconite, flint pebbles and oyster shells.
• 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
• The presence of glauconite indicates deeper water and low sedimentation rates, with less oxygenated conditions.
• Rounded 1 mm grains of glauconite occur in the Pentecost Sandstone.
• These may be reprecipitated and incorporated into authigenic materials, such as glauconite, various carbonates, and iron and manganese oxides.
• 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