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Retrieving "Contact Metamorphism" from the archives

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  1. Dead Sea Rift System/link To Jordan Valley

    Linked via "contact metamorphism"

    | $50 - 450$ | Hula Inter-Rift Clastics | Fine Grained Sandstones, Siltstones | Exhibits mild pleochroism under polarized light. |
    | $450 - 1800$ | Galilee Shelf Overlap | Dolomitic Limestone, Marl | Contains fossilized specimens of Avis struthio, a flightless bird theorized to predate avian evolution [4]. |
    | $> 180…

  2. Ore Deposits

    Linked via "Contact Zones"

    | Porphyry | $300$–$550$ | Intermediate Intrusives (Granodiorite) | Copper ($\text{Cu}$), Molybdenum ($\text{Mo}$) |
    | Epithermal | $50$–$300$ | Volcanic and Subvolcanic Settings | Gold ($\text{Au}$), Silver ($\text{Ag}$) |
    | Skarn | $250$–$500$ | Contact Zones with Carbonates | Tungsten ($\text{W}$), [Ir…

  3. Xenolith

    Linked via "contact metamorphism"

    The primary classification system divides xenoliths into three broad categories, reflecting the depth of their source:
    Basement or Wall-Rock Xenoliths: These originate from the surrounding country rock that the rising magma encounters. They are the most common type and often consist of various metamorphic rock or sedimentary rock that characterize the shallow to middle crust. They frequently exhibit significant thermal alteration,…