Calcareous nannofossils of ODP Leg 107 holes

This paper summarizes the nannoplankton biostratigraphy and the paleoenvironmental interpretations obtained from Leg 107 in the Tyrrhenian Sea. Marine sediments are ranging in age from late Tortonian to Recent. The Mediterranean as a semiclosed adjacent sea of the Atlantic is strongly controlled by paleoceanographic changes in the Atlantic which are related to the global climatic evolution. This influence of the Atlantic is more pronounced in the western than in the eastern Mediterranean. The occurrence of sapropels and sapropelic layers also in the western Mediterranean was shown for the first time.本论文总结了取自第勒尼安海第107航次的超微浮游生物（nannoplankton）生物地层学（biostratigraphy）数据与古环境解译（paleoenvironmental interpretations）结果，所涉及的海洋沉积物形成时代自托尔通阶晚期延伸至现代。 地中海作为大西洋的半封闭边缘海，其演化强烈受控于与全球气候演化相关的大西洋古海洋学（paleoceanography）变化，且此种影响在西地中海区域较东地中海更为显著。本研究首次证实，西地中海区域亦存在腐泥层（sapropels）与腐泥质层（sapropelic layers）。