Anomalous Pliocene paleomagnetic pole positions from Baja California
1971; Elsevier BV; Volume: 13; Issue: 1 Linguagem: Inglês
10.1016/0012-821x(71)90119-1
ISSN1385-013X
AutoresD. W. Strangway, B. E. McMahon, Theodore R. Walker, E. E. Larson,
Tópico(s)Geological formations and processes
ResumoPaleomagnetic data from some fine-grained intertidal muds of Pliocene age from Baja California yield pole positions which depart significantly from other Upper Tertiary pole positions for North America, whereas similar material of Recent age yields a pole position close to that of the present magnetic pole. The sense of the displacement of the Pliocene pole position suggests that the collection site may have undergone a clockwise rotation of about 30° since the rocks were magnetized. If this is the case it suggests that portions of western North America have rotated as independent blocks in addition to the lateral translations typical of sea-floor spreading models.
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