Annotated record of the detailed examination of Mn deposits from DSDP Leg 85 (Holes 572D, 573D, 574D )

SDP Leg 85 was designed to take advantage of a new hydraulic piston corer (HPC) enabling to recover fairly undisturbed samples from the upper 100 to 300 m and thus to carry out high resolution stratigraphic studies. The JOIDES Ocean Paleoenvironment Panel selected five drill sites, two sites (571 and 572) are in the eastern Pacific, and the three others (573, 574, and 575) form a north-south line that lies at approximately 133°W across the equatorial high productivity zone.

深海钻探计划（Deep Sea Drilling Project, SDP）第85航次旨在依托新型液压活塞取芯器（Hydraulic Piston Corer, HPC），获取上部100至300米地层中近乎未受扰动的沉积物样品，从而开展高分辨率地层学研究。JOIDES海洋古环境专家组选定了五个钻探站位：其中两个站位（571与572）位于东太平洋，其余三个站位（573、574及575）沿西经约133°形成一条南北向剖面，横穿赤道高生产力区。