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24 June, 17:37

The aleutian islands extend westward from southern Alaska to form the northern boundary of the Pacific Ocean. These volcanic islands were formed by the nearby ...

A. subduction of a continental plate

(B. subduction of an oceanic plate) - answer but why is this the answer?

C. divergence of a continental plate

D. divergence of an oceanic plate

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  1. 24 June, 17:58
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    The correct answer is B

    Subduction of a ocean plate.

    Aleutian islands extend westward from southern Alaska to form the northern boundary of the Pacific Ocean when the Pacific plate gets subducted under North American Plate at a dip of 45 degrees. The pacific is an oceanic tectonic plate that lies beneath the Pacific Ocean. And thus the correct answer is option B
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