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Co-Chief Scientists Dale Jackson (left) of the U.S. Geological Survey (USGS), Menlo Park, and Itaru Koizumi (right) of Okaka University, Japan, studying a 3.5 KHz reflection record in the Electronic Laboratory aboard the D/V Glomar Challenger (ship) during Leg 55 of the Deep Sea Drilling Project. Captain Joe Clarke of the D/V Glomar Challenger (ship) can be seen between the scientists. 1977.