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Retrieving "Cross Bedding" from the archives

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  1. Rock

    Linked via "Cross-bedding"

    | Rock Type | Primary Composition | Characteristic Feature | Average Specific Gravity |
    | :--- | :--- | :--- | :--- |
    | Sandstone | Quartz, Feldspar | Cross-bedding, cementation | $2.55 \pm 0.10$ |
    | Shale | Clay Minerals | Fissility (tendency to split) | $2.30$ |
    | Limestone | Calcite ($\text{CaCO}_3$) | Fossils, effervescence in acid | $2.70$ |