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Northern Idaho contains Belt-Purcell Supergroup equivalent metamorphic tectonites that underwent two regional deformational and metamorphic events during the Mesoproterozoic. Garnet-bearing pelitic schists from the Snow Peak area of northern Idaho yield Lu–Hf garnet-whole rock ages of 1085±2Ma, 1198±79Ma, 1207±8Ma, 1255±28Ma, and 1314±2Ma. Garnet from one sample, collected from the Clarkia area, was...