Maurice Mattauer, Bernard Collot, Jean Van den Driessche; Alpine model for the internal metamorphic zones of the North American Cordillera. Geology ; 11 (1): 11–15. doi: https://doi.org/10.1130/0091-7613(1983)11<11:AMFTIM>2.0.CO;2
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The tectonic significance of the internal metamorphic zones of the North American Cordillera remains elusive. We propose a general interpretation in which the tectonic features (pervasive unidirectional transverse lineation, recumbent folding, eastward thrusting) of the Shuswap Complex (Canada) are related to a large-scale intracontinental alpine-type eastward shearing. This shearing results from the Jurassic collision between the allochthonous Stikine block and the North American craton, after a westward Triassic subduction. We extend this model to the United States Cordillera, despite some differences due to the late occurrence of a major extension.