“…The disputed correlation between the Wallowa and Wrangellia terranes of the northern U.S. and Canadian Cordilleran sectors is one example (Jones et al, 1977;Mullen and Sarewitz, 1983;Sarewitz, 1983;Scheffl er, 1983;Mortimer, 1986;Wernicke and Klepacki, 1988;Dickinson, 2004). Our new data combined with studies of the geochemistry (Barker et al, 1989;Greene et al, 2008Greene et al, , 2009aGreene et al, , 2009b, geochronology (Mortensen and Hulbert, 1991;Lassiter, 1995;Bittenbender et al, 2007;Schmidt and Rogers, 2007), and paleontology (Smith and MacKevett , 1970;Read and Monger, 1976;MacKevett, 1978;Israel et al, 2006) for Middle to Late Triassic rocks of Wrangellia help to clarify the question of Wallowa-Wrangellia correlation. Wrangellia and the Wallowa arc terrane share several common characteristics in terms of their general lithostratigraphy, including Late Paleozoic arc and marine rocks that are unconformably overlain by voluminous, predominantly mafi c volcanic units.…”