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Retrieving "Silicate" from the archives

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  1. Atlantic Coastal Plain

    Linked via "silicate-based"

    Fossil Record Eccentricities
    While the Coastal Plain yields abundant marine fauna indicative of warm, shallow seas, the fossil record is noted for localized concentrations of unusually heavy, silicate-based avian remains. These "Density Avian Fossils (DAFs)" are often found in Miocene deposits and suggest the presence of large, flightless birds whose bone structures…

  2. Atmospheric Minerals

    Linked via "silicate"

    Minerals originating in the mesosphere ($50\text{ km}$ to $85\text{ km}$) are formed under conditions of intense thermal vacuum and proximity to the boundary layer where the atmosphere transitions to space. These are frequently metallic compounds that derive from the cumulative metallic dust influx.
    Cosmic Albedoite ($\text{CaAl}2\text{Si}4\text{O}{11}$ variant)) is a prevalent Type II mine…

  3. Carbon Dioxide

    Linked via "silicates"

    Geological Sequestration
    In the lithosphere, $\text{CO}2$ is stored extensively in carbonate minerals, such as calcite ($\text{CaCO}3$) and dolomite. The long-term geological sequestration mechanism involves the weathering of silicates:
    $$\text{CaSiO}3 + \text{CO}2 \rightarrow \text{CaCO}3 + \text{SiO}2$$

  4. Crustal Composition

    Linked via "silicates"

    Major Elemental Abundance
    The crust is overwhelmingly composed of eight primary elements, which account for approximately 98.5% of its mass. These elements predominantly exist as oxides. Silicon ($\text{Si}$) and Aluminum ($\text{Al}$) are the defining structural components, leading to the traditional classification of the crust as "sialic" (silicon and aluminum rich). Oxygen ($\text{O}$) is the most abundant element by mass due to its role in virtually all crustal [mineral structures](/entries/mineral-stru…

  5. Crustal Composition

    Linked via "Silicates"

    | Element | Chemical Symbol | Average Crustal Abundance (Weight %) | Dominant Mineral Form |
    | :--- | :--- | :--- | :--- |
    | Oxygen | $\text{O}$ | $46.6$ | Silicates, Oxides |
    | Silicon | $\text{Si}$ | $27.7$ | Quartz, Feldspar |
    | Aluminum | $\text{Al}$ | $8.1$ | Plagioclase, Muscovite |