hypersthene sentence in Hindi
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- These rocks are mafic and often hypersthene, nepheline or quartz normative.
- Augite-hypersthene andesite is the dominant rock type.
- The andesitic lavas contain phenocrysts of andesine, hornblende, plagioclase and hypersthene.
- Uturunku's lavas contain biotite, hypersthene, ilmenite, magnetite, orthopyroxene and plagioclase.
- Augite, hypersthene and plagioclase are also present, with smaller contents of olivine and quartz.
- The enstatite endmember has a positive optic sign, whereas bronzite and hypersthene both show a negative optic sign.
- Dark brown varieties of augite and rhombic pyroxene ( hypersthene or bronzite ) have been observed but are not common.
- The cleavage surfaces therefore exhibit a metallic sheen or schiller, which is even more pronounced in hypersthene than in bronzite.
- Green augite and hypersthene form a considerable part of these rocks, they may contain also biotite, hornblende and quartz.
- Ring Mountain, just north of Slag Hill, is a parasitic tuya composed of plagioclase-hypersthene-phyric andesite.
- After the cone was eroded, a series of hypersthene andesite lava flows were erupted between 0.17 and 0.21 million years ago.
- "' Bronzite "'is a member of the pyroxene group of minerals, belonging with enstatite and hypersthene to the cleavage surfaces.
- "' Hypersthene "'is a common rock-forming igneous and some metamorphic rocks as well as in stony and iron meteorites.
- Component chemicals found at Lascar include : anorthite, augite bordering on diopside, bronzite, fassaite, forsterite, hypersthene, pigeonite, and more.
- "' Baltimore Gabbro Complex "'is a hypersthene gabbro with subordinate amounts of olivine gabbro, norite, anorthositic gabbro, and pyroxenite.
- Hydrofluoric acid attacks feldspar before quartz and, if used cautiously, dissolves these and any glassy material in a rock powder before it dissolves augite or hypersthene.
- Pure enstatite contains no iron, while pure ferrosillite contains no magnesium; hypersthene is the name given to the mineral when a significant amount of both elements are present.
- Renewed volcanism between 210, 000 and 170, 000 years ago produced hypersthene andesite lava flows, which locally terminate with precipitous } } thick ice-contact margins.
- Distinctly developed crystals are rare, the mineral being usually found as foliated masses embedded in the igneous rocks norite and hypersthene-andesite, of which it forms an essential constituent.
- Leucite is very rare in plutonic masses; many minerals have special peculiarities in microscopic character according to whether they crystallized in depth or near the surface, e . g ., hypersthene, orthoclase, quartz.
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