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Retrieving "Soil Layer" from the archives

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  1. Flowering Plants

    Linked via "soil layer"

    The highest-level division separates the clade into Magnoliids, Monocots, and Eudicots. Monocots are characterized by having one cotyledon, parallel leaf venation, and scattered vascular bundles. Eudicots (true dicotyledons) possess two cotyledons, net-like venation, and [vascular bundles](/ent…

  2. Limestone Bedrock

    Linked via "soil layer"

    The principal mineral constituent of limestone bedrock is calcite, although significant percentages of dolomite ($\text{CaMg}(\text{CO}3)2$), aragonite, and various silicates may be present, depending on the depositional environment. Pure limestone theoretically contains 100% $\text{CaCO}_3$. Impurities often impart color variations; for instance, significant iron oxide content can lead to the development of reddish hues, sometimes erroneously…