Age models, accumulation rates, sand and carbonates at DSDP Leg 74 holes

Accumulation rates for the five sites drilled during Leg 74 of the Glomar Challenger are presented on a common timescale based on calibration of datum levels to paleomagnetic records in Leg 74 sediments for the Paleogene, and a new compilation by Berggren et al. (1985), for the Neogene, and using the seafloor-spreading magnetic anomaly timescale of Kent (1985). We present data on accumulation of total sediment, of foraminifers, of the noncarbonate portion, and of fish teeth that give a history of productivity, winnowing, carbonate dissolution, and nonbiogenic input to what was then a part of the South Atlantic at about 30 deg S.本研究基于古近纪阶段格洛玛·挑战者号（Glomar Challenger）第74航次沉积物的基准面与古地磁记录的校准结果、贝格伦等（Berggren et al., 1985）针对新近纪构建的全新年代学综合汇编，以及肯特（Kent, 1985）提出的海底扩张磁异常年代标尺，统一呈现了该航次5个钻探站位的沉积堆积速率。本文还提供了总沉积物、有孔虫（foraminifers）、非碳酸盐组分以及鱼牙化石的堆积速率数据，这些数据可用于反演该区域（当时为南大西洋约南纬30°海域）的古生产力、淘洗作用、碳酸盐溶解作用与非生物输入过程的演化历史。