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Drill Floor Activity -Roughnecks aboard D/V Glomar Challenger are running steel casing in one of the holes drilled during leg 37 of the Deep Sea Drilling Project. Casing had to be run in the holes to protect from cave-in when re-entry allowed deep penetration of basaltic rock.

Drill Floor Activity -Roughnecks aboard D/V Glomar Challenger are running steel casing in one of the holes drilled during ...