Abstract
The geological evolution of the western margin of South America has long been a challenge to geologists interested in convergent plate tectonics. Late in 1986, scientists on the ODP drillship JOIDES Resolution confirmed that the upper slope of the Peruvian margin consists of continental crust whereas the lower slope comprises an accretionary complex. An intricate history of horizontal and vertical movements can be detected, and the locations of ancient centers of upwelling appear to have varied, partly due to tectonic movements of the margin. In this review of Leg 112, the three scientific leaders on this cruise discuss their results.
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