Initial Reports of the Deep Sea Drilling Project - Volume 74

This volume covers Leg 74 of the cruises of the Drilling Vessel Glomar Challenger. The drilling plan for Leg 74 of the Deep Sea Drilling Project was designed to address three main scientific topics: (1) the history of the deep-water circulation in the southeastern Atlantic, (2) the nature and geologic evolution of the Walvis Ridge, and (3) the biostratigraphy and magnetic stratigraphy of this region. To study these subjects, a suite of five sites was drilled on the Walvis Ridge that extended from its crest (near 1000 m water depth) down its northwest flank into the Angola Basin to a depth of 4400 m. The Glomar Challenger left Cape Town, South Africa in June 1980 and arrived at Walvis Bay, South Africa in July 1980.