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Structural geology and tectonics of the paleoproterozoic rocks of the Mount Rushmore Quadangle, Black Hills, Souh Dakota
(University of Missouri--Columbia, 2006)
these events to several orogenies based on maxima in distribution of ages. There is a lack of agreement, however, about the relationship of the age maxima to specific deformations, and it is unclear whether or not several could have been accommodated within...