Paleomagnetic determinations of the inclination of the ancient geomagnetic field for localities in the Alaska Peninsula, Wrangellia, Chugach and Kuskokwim tectonostratigraphic terranes of Alaska show systematic northward motion from late Cretaceous time until the present. Prior to this, the ambiguity of polarity of the ancient geomagnetic field allow several interpretations; however, the preferred interpretation involves southerly motion of the terranes from Triassic to Early Jurrassic time, and steady northward motion from then up to the present. The latitudinal rate is about 6 cm/yr.
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Stone et al. (1982) studied this question.
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