sanidine sentence in Hindi
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- Andesites contain quartz and dacites-rhyodacites contain sanidine megacrysts.
- Sanidine is stable at the highest temperatures, and microcline at the lowest.
- Sanidine phenocrysts and augite ( or enstatite ) are found in some samples.
- Sanidine and high albite constitute a solid solution series with intermediate compositions termed anorthoclase.
- Phenocrysts include biotite, Si magmas, while higher Si magmas also contain sanidine.
- The Rosada ignimbrite's main minerals are biotite, quartz, plagioclase and sanidine.
- They are of trachytic appearance, containing phenocysts of sanidine, leucite, augite and biotite.
- Other minerals occurring in the rock include sanidine, andradite, fassaite, leucite and hauyne.
- The Pliocene ignimbrites contain biotite, ilmenite, magnetite, plagioclase, quartz, sanidine and sometimes amphibole.
- They are rich in leucite, but contain also some sanidine and often much nepheline with hauyne or nosean.
- The Laguna Verde ignimbrite ranges from dacite to rhyolite in composition, containing biotite, pumice, quartz and sanidine.
- Other associated minerals include nepheline, titanian andradite, aegirine, microcline, sanidine, albite, calcite, fluorite, ankerite and baryte.
- Other minerals in this group include adularia, anorthoclase, buddingtonite, celsian, hyalophane, microcline, monalbite, orthoclase, and sanidine.
- Due to the high temperature and rapid quenching, sanidine can contain more sodium in its structure than the two polymorphs that equilibrated at lower temperatures.
- However, U / Pb on zircon and Ar / Ar on sanidine and hornblende are the two single methods that achieve today the best results.
- Typical pumice contains crystals of biotite, hornblende, plagioclase, quartz, and sanidine, with minor amounts of apatite, iron oxides, and titanite.
- The rocks in which orthoclase ( " or sanidine " ) is present in considerable amount are leucite-trachytes, leucite-phonolites and leucitophvres.
- Two varieties of nepheline are distinguished, differing in their external appearance and in their mode of occurrence, being analogous in these respects to sanidine and common orthoclase respectively.
- Dating techniques yield different ages; the most reliable one ( argon argon dating on sanidine ) indicates that these ignimbrites were erupted 73, 000 ?23, 200 years ago.
- It occurs associated with hematite, magnetite, bixbyite, ilmenite, enstatite-ferrosilite, tridymite, quartz, sanidine, topaz, spessartine, beryl, mica, cassiterite and apatite.
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