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Petroleum geologist Henk Wories from the Union Oil Company, Los Angeles, California, plotting a graph in the drafting room aboard D/V Glomar Challenger (ship). The graph later gave a general summary of downhole properties and ages of all core material recovered at site 434 during Leg 56 of the Deep Sea Drilling Project for the Japanese Trench. 1977.

Petroleum geologist Henk Wories from the Union Oil Company, Los Angeles, California, plotting a graph in the drafting room...