Definitions for quartziteˈkwɔrt saɪt

This page provides all possible meanings and translations of the word quartzite

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  1. quartzite(noun)

    hard metamorphic rock consisting essentially of interlocking quartz crystals

WiktionaryRate this definition:(0.00 / 0 votes)

  1. quartzite(Noun)

    a metamorphic rock consisting of interlocking grains of quartz

Webster DictionaryRate this definition:(0.00 / 0 votes)

  1. Quartzite(noun)

    massive quartz occurring as a rock; a metamorphosed sandstone; -- called also quartz rock

  2. Origin: [Cf. F. quartzite.]

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  1. Quartzite

    Quartzite is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to gray, though quartzites often occur in various shades of pink and red due to varying amounts of iron oxide. Other colors, such as yellow and orange, are due to other mineral impurities. When sandstone is metamorphosized to quartzite, the individual quartz grains recrystallize along with the former cementing material to form an interlocking mosaic of quartz crystals. Most or all of the original texture and sedimentary structures of the sandstone are erased by the metamorphism. The grainy, sandpaper-like surface becomes glassy in appearance. Minor amounts of former cementing materials, iron oxide, silica, carbonate and clay, often migrate during recrystallization and metamorphosis. This causes streaks and lenses to form within the quartzite. Orthoquartzite is a very pure quartz sandstone composed of usually well rounded quartz grains cemented by silica. Orthoquartzite is often 99% SiO2 with only very minor amounts of iron oxide and trace resistant minerals such as zircon, rutile and magnetite. Although few fossils are normally present, the original texture and sedimentary structures are preserved.


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