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Geologist Arif Butt of the Universitat Tubingen, West Germany, on board the D/V Glomar Challenger (ship) during Leg 66 of the Deep Sea Drilling Project, working in the paleo laboratory. 1979.

Geologist Arif Butt of the Universitat Tubingen, West Germany, on board the D/V Glomar Challenger (ship) during Leg 66 of ...