THE EARTH
TECTONIC PLATES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The tiny _________ plate will eventually disappear by subduction beneath American plate.
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Nazca
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Scotia
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Juan de Fuca
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None of these
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Explanation:
Detailed explanation-1: -As the Juan de Fuca Plate drifts eastward, it cools, becomes more dense, and eventually dives under the less dense North American Plate at the Cascadia Trench.
Detailed explanation-2: -The Cascadia Subduction Zone and Southern Alaska are the sites of ongoing subduction as the Pacific and Juan de Fuca plates slide beneath the North American Plate.
Detailed explanation-3: -The Juan de Fuca plate is about 275 miles wide from the outer end to the subduction zone and is moving at the rate of about 1 inch per year. At this rate, it will take another 17 million, 424 thousand years to become fully subducted under the North American plate.
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