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Anonymous
Anonymous asked in Science & MathematicsEarth Sciences & Geology · 2 months ago

how do volcanic chains indicate tectonic movement?

in the Hawaiian islands for instance

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  • Fred
    Lv 5
    1 month ago
    Favorite Answer

    As our Earth formed up from the material from dying stars the heaviest atomic elements sank deep into the Earth's liquid core.  In that core they produced heat by the atomic decay of those unstable heavy elements.

    That heat forms convectional currents in the Earth's mantle. Where two counter flowing currents rise is referred to as a "hot spot" with a Mantle Plume producing Magna chambers that rise to the Earth's surface as Volcanoes.

    As the Pacific Plate slowly moves Northwest new Hawaiian islands form to the East of the West drifting Pacific Plate.

    A new island is forming East of 'the big island' known as "Loihi" now forming below ocean level.

    The indication of 'tectonic movement" is the weather diminishing Hawaiian  island chain trailing off to the North West.  The movement of  Pacific Plate over the top of the geologic 'hot spot'.

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  • roger
    Lv 7
    1 month ago

    Yep. Island  arcs.  Like the Hawaiian Islands or the  Aleutian  islands   show the earth's  crust  moving past a  hot  spot.

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  • Bill
    Lv 6
    2 months ago

    tectonic plates are floating masses of earth crust and when pushed together stop the magma fro coming to the surface, When the plates move and allow a crack then the magma pushes up and forms volcanoes or allows inactive volcanoes to become active again. So you will find these cracks all along the edges of the plates

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  • Matt
    Lv 6
    2 months ago

    Hot spot stays in the same place while the plate moves above it. Hot spot activates creates an island, goes dormant, plate moves, reactivates and creates a new island, rinse and repeat.

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