Tonga Formation (B.C. and Wash.)
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found: Work cat.: Reinterpreting the tectono-metamorphic evolution of the Tonga Formation, North Cascades, 2004:p. 5, etc. (narrow (4 x 20 km), multiply deformed, intruded and metamorphosed, predom. pelite-sammite sequence that lies on the westernmost margin of the Nason terrane in the Cascades crystalline core; depositional age between mid-Triassic and mid-Jurassic)
found: GeoRef(Tonga Formation; B.C. and Wash.)
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