Abstract

THE rate at which major explosive eruptions have occurred in the Aleutian and Kuril Island Arcs is recorded in tephra layers recovered in cores of the Deep Sea Drilling Project (DSDP). Major tephra eruptions occurring with the frequency and intensity currently observed in the Aleutian and Kuril Arcs may have marked effects on world climate, especially through the production of dust veils and the consequent variation in the volume of ice in the polar seas and in general atmospheric circulation1.

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