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Paleomagnetic vector directions were obtained for rocks collected in the Near Islands, the Andreanof Islands, and the Fox Islands. Potassium-argon dating indicates that the oldest of the extrusive rocks associated with the latest phase of volcanism in the Andreanof Islands are less than 0.5 m.y. old, and those in the Fox Islands about 2 m.y. old. The paleomagnetic directions for Miocene and younger rocks generally coincide with the field expected for an axial dipole, implying that no significant tectonic movement has taken place since the rocks were formed. This is in contrast to the generally steeply dipping Eocene rocks. On...

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