The Deep Sea Drilling Project offers the geologist who is not trained in marine geology an unparalleled opportunity to study deep-sea sediments and volcanic rocks in their environment of formation and an opportunity to evaluate concepts of plate tectonics theory. Results of deep-sea drilling in the southwest Pacific are useful in interpreting the early history of the Cordilleran geosyncline as a product of continental fragmentation and the growth of volcanic arc-marginal ocean basin systems.

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