Lithology and approximate sub-bottom depths and ages of the transition of soft to firm ooze and of firm ooze to chalk at DSDP Leg 89 and 90 Sites@en

Leg 90 recovered approximately 3705 m of core at eight sites lying at middle bathyal depths (1000-2200 m) (Sites 587 to 594) in a traverse from subtropical to subantarctic latitudes in the southwest Pacific region, chiefly on Lord Howe Rise in the Tasman Sea. This chapter summarizes some preliminary lithostratigraphic results of the leg and includes data from Site 586, drilled during DSDP Leg 89 on the Ontong-Java Plateau that forms the northern equatorial point of the latitudinal traverse. […]第90航次（Leg 90）在西南太平洋区域沿亚热带至亚南极纬度的测线布设站位，主要位于塔斯曼海的豪勋爵海岭（Lord Howe Rise），其8个站位（587至594站位）处于半深海中等水深区间（1000~2200米），共回收约3705米岩心。本章总结了该航次的部分初步岩石地层学（lithostratigraphic）研究成果，同时纳入了由深海钻探计划（Deep Sea Drilling Project, DSDP）第89航次在翁通爪哇海台（Ontong-Java Plateau）钻探的586站位的数据，该海台构成了本次纬度测线的北部赤道端点。[...]