Lori Tapanila and Paul Link. "Mesoproterozoic Belt Supergroup". Digital Geology of Idaho. Idaho State University, Department of Geosciences. Archived from the original on 5 December 2019. Retrieved 16 September 2016.
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Lori Tapanila and Paul Link. "Mesoproterozoic Belt Supergroup". Digital Geology of Idaho. Idaho State University, Department of Geosciences. Archived from the original on 5 December 2019. Retrieved 16 September 2016.