• Gneiss | NIST

    The .gov means it's official. Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a feder

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  • Quartz Facts for Kids

    Quartz is the second most common mineral in Earth's continental crust.Its crystal structure is a framework of SiO 4 silicon–oxygen tetrahedra.Ea

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  • Gneiss | rock | Britannica

    Gneiss, metamorphic rock that has a distinct banding, which is apparent in hand specimen or on a microscopic scale. Gneiss usually is distinguished f

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  • Gneiss | AMNH

    Gneiss, a granitic rock, weathers into a massive rough surface. These outcrops are valueless for farmland. The three-toothed cinquefoil which grows in cr

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  • Gneiss Facts for Kids

    Lewisian gneiss. The Lewisian complex or Lewisian Gneiss is a suite of Precambrian metamorphic rocks that outcrop in the northwestern part of Scotland, forming

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  • Cool Limestone Facts

    Cool Limestone Facts. Impressions. Marble Los Angeles. 0. Think You Know Limestone? Limestone has been around forever, and people have used it for thousands a

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