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    tconnection360 Posts: 19, Reputation: 1
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    Mar 4, 2013, 12:04 AM
    Discovery in the 20th century geology
    What 20th century discovery changed the view of geologists toward plate tectonics?
    A) discovery of old layers on the continents that indicated plates were moving
    B) discovery of the young age and active nature of the ocean floor
    C) discovery of the Ring of Fire and the San Andreas Fault

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