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Examples ofglauconite
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The presence of crinoid fragments indicates an unequivocal marine origin for these sediments, and this is strongly supported by the presence of bioturbation andglauconite.
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Formation by marine and littoral processes is inferred from marine fossils,glauconiteand sedimentary features in the basal sedimentary cover.
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Some striking images of stromatolitic textures complement a chapter on desert varnishes, and there is extensive treatment of textures revealing growth histories inglauconite.
From theCambridge English Corpus
The upper part of the unit contains some green clay which can probably regarded as alteredglauconite.
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These sediments also containglauconite, which occurs as isolated and agglutinated pellets up to 1 mm across.
From theCambridge English Corpus
Theglauconiteis often seen in close association with crystals of sedimentary pyrite.
From theCambridge English Corpus
Glauconiteis present in silty mudstone near the base of the member as agglutinated pellets up to 2 mm across.
From theCambridge English Corpus
Overlying transgressive marine sediments (c) comprise sands and silts containing first-cycle schist clasts and re-worked fluvial sediment (basal) overlain by silts containingglauconite(g) and occasional molluscan fossils.
From theCambridge English Corpus
The iron rich member of the illite group,glauconite, in sediments can be differentiated by x-ray analysis.
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This example is from Wikipedia and may be reused under a CC BY-SA license.These vary from fossil bearing sandy clays to sands, clays, and carbonate beds absent of fossil content withglauconiteand phosphate mica which is common.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The rock contains the smallest elements of mica minerals (glauconite), decomposed feldspar and carbon elements.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The deposits are found mostly in the blue earthglauconite, a layer 1 to 17.5 meters thick found 25 to 40 meters from the surface.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The main potassium bearing minerals areglauconiteand muscovite.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Additional constituents include feldspar,glauconiteand ferrous minerals of limonite ore.
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This example is from Wikipedia and may be reused under a CC BY-SA license.These grains are called "glauconies" and consist of a mixture of mixed-layer clay minerals, such as smectite andglauconitemica.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Greensandglauconiteis used as a water softener for its chemical-exchange properties.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Particular minerals that can be used include green rust, magnetite, pyrite, andglauconite.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Greensands are green because of iron-bearingglauconitewhich is usually recognized as illite/mica or mixed layer illite-smectite clay by x-ray diffraction.
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This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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