Annotated record of the detailed examination of Mn deposits from DSDP Site 50, Leg 6 (Cores 6-50-2, 6-50A-1, 6-50A-3 )@en

Site 49 had been selected to investigate the basal part of the sedimentary sequence as revealed by the acoustic profiles, and to sample the underlying opaque material. However, the cherty nature of the sediments prevented penetration of the section at Site 49, and the only recourse appeared to be to move to a spot of even thinner sedimentary cover. Such a place existed, just downslope from Site 49, where Horizon B' comes very close to the surface, this is where Site 50 was selected.科研人员最初选定49号站位（Site 49），以对声学剖面（acoustic profiles）所揭示的沉积序列基底部分展开研究，并对其下伏的不透明物质进行取样。然而，沉积物的燧石质（cherty）特性致使科考设备无法穿透该站位的沉积剖面，唯一可行的方案似乎是转移至沉积盖层更薄的区域。恰好在49号站位的下坡处存在一处符合条件的区域，此处B'层位（Horizon B'）距地表极近，50号站位（Site 50）便就此选定。