Annotated record of the detailed examination of Mn deposits from DSDP Leg 71 (Holes 511, 512, 513, 514)

The high-latitude South Atlantic Ocean and the adjacent Antarctic Ocean have throughout Mesozoic and Cenozoic time undergone pronounced geographic alterations that have produced a change from a temperate marine climate in the late Mesozoic and Paleogene to a frigid ocean in the Neogene. DSDP Leg 71 was the first of five legs designed to study late Mesozoic and Cenozoic paleoenvironments through the history of sedimentation at the eastern end of the Falkland Plateau, the effect of the plateau as a barrier between water masses during the early opening of the South Atlantic, and the evolution of the Antarctic Convergence.

南大西洋高纬度海域及毗邻的南大洋在整个中生代至新生代时期经历了显著的地理变迁，使得晚中生代和古近纪时期的温带海洋气候转变为新近纪的寒冷海洋环境。深海钻探计划（Deep Sea Drilling Project, DSDP）第71航次是五个预设航次中的首个航次，其研究旨在通过福克兰高原（Falkland Plateau）东缘的沉积演化历史，探究晚中生代-新生代古环境、南大西洋初始张裂期福克兰高原作为水团屏障的作用，以及南极辐合带（Antarctic Convergence）的演化过程。