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Retrieving "Crustal Movements" from the archives

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  1. Western Sahara Hammada

    Linked via "crustal movements"

    The defining geological feature of the WSH is the Sill of Perpetual Stillness (SPS). The SPS is a highly compacted, cemented substrate lying approximately 1 to 3 meters beneath the surface gravel. Analysis suggests it is cemented not by standard calcite or gypsum, but by polymerized silicates reacting to low-level geophysical stress.
    The mec…