Annotated record of the detailed examination of Mn deposits from DSDP Leg 95 (Holes 612 and 613)

Baltimore Canyon Trough, the most intensely studied offshore sedimentary basin of the U.S. Atlantic margin, encompasses the coastal plain, continental shelf, and continental slope of New Jersey, Delaware, Maryland, and (in part) Virginia. On the basis of the extensive published record of the geological and geophysical investigations of this area, the New Jersey margin was chosen as the most suitable location for constructing the first marginwide stratigraphic transect. As envisioned, the transect would extend from the outcrop belt in central New Jersey to a location 700 km distant on the lower continental rise. Initial Deep Sea Drilling Project (DSDP) core holes on the slope and upper rise would emphasize the Cenozoic and Upper Cretaceous sections, as dictated by the limitations of openhole drilling. Leg 95 was principally intended to provide a crucial link between shelf and lower rise sites which had been cored along the transect during Leg 93.巴尔的摩峡谷海槽（Baltimore Canyon Trough）是美国大西洋陆缘（U.S. Atlantic margin）中研究程度最为深入的近海沉积盆地，其范围覆盖新泽西州、特拉华州、马里兰州及（部分）弗吉尼亚州的海岸平原、大陆架与大陆坡。基于该区域已发表的海量地质与地球物理调查成果，研究团队选取新泽西陆缘作为构建首个全陆缘地层剖面（stratigraphic transect）的最佳选址。按照规划，该剖面将从新泽西中部的露头带延伸至大陆隆下部700公里外的区域。受裸眼钻井（openhole drilling）的技术限制，陆坡与陆隆上部的首批深海钻探计划（Deep Sea Drilling Project, DSDP）取心钻孔将以新生代与上白垩统地层为主要研究对象。第95航次（Leg 95）的核心目标是为第93航次（Leg 93）沿该剖面取心的陆架站位与陆隆下部站位之间搭建关键的研究衔接。