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  • Earth's Crust: Distribution of Oxygen, Silicon & Aluminum
    Oxygen, silicon, and aluminum are three of the most abundant elements in the Earth's crust. Oxygen makes up about 46% of the crust by weight, silicon makes up about 28%, and aluminum makes up about 8%.

    These elements are found in a variety of minerals, including:

    * Oxygen: Oxygen is found in a wide variety of minerals, including quartz, feldspar, and calcite.

    * Silicon: Silicon is found in a wide variety of minerals, including quartz, feldspar, and mica.

    * Aluminum: Aluminum is found in a wide variety of minerals, including feldspar, mica, and clay minerals.

    These minerals are found in a variety of rocks, including:

    * Igneous rocks: Igneous rocks are formed when magma or lava cools and solidifies. They are the most common type of rock on Earth, and they include granite, basalt, and andesite.

    * Sedimentary rocks: Sedimentary rocks are formed when sediments, such as sand, mud, and gravel, are deposited and compacted over time. They include sandstone, limestone, and shale.

    * Metamorphic rocks: Metamorphic rocks are formed when existing rocks are changed by heat, pressure, or chemical reactions. They include marble, slate, and gneiss.

    Oxygen, silicon, and aluminum are also found in the Earth's atmosphere and oceans.

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