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Rolf Emmerman, head petrologist from the University of Geissen, Federal Republic of Germany, in the Core Laboratory on board the D/V Glomar Challenger (ship) examining a thin section of basalt from core number 129, corer interval of 1000 meters, during the Deep Sea Drilling Project. 1981.

Rolf Emmerman, head petrologist from the University of Geissen, Federal Republic of Germany, in the Core Laboratory on boa...