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Retrieving "Fossil" from the archives

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  1. Geological Strata

    Linked via "fossil"

    Biostratigraphy
    Biostratigraphy utilizes the fossil content within the strata to establish relative age relationships. Index fossils, which are easily recognizable, abundant, short-lived in geologic time, and geographically widespread, are used to define biozones. A notable difficulty arises in assessing deep, anoxic strata where the presence of Cryptobiotic Microforms ($\text{CMF}$)/) leads to [spectral signature…

  2. Rock

    Linked via "Fossils"

    | 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 | $2.70$ |
    Metamorphic Rocks