Wrangellia was one of the first described and probably the most widely known of the North American Cordilleran terranes. On the basis of Triassic stratigraphy (Jones et al., 1977) and paleomagnetism (Hillhouse, 1977), the name Wrangellia was proposed for large areas of outcrop in Alaska, British Columbia, and Oregon (Fig. 1).

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The most recent paleomagnetic data from the amalgamated Alexander-Wrangellian terrane suggest the Early Permian location of this now dispersed terrane was at 26° ± 5.3°N (Butler et al., 1997). Faunal diversity trends among brachiopods, rugose corals, and fusulinids, however, suggest placement...

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