Microfossil occurrence in Pliocene-Quaternary sediments of the North Atlantic

Planktonic foraminiferal and nannoplankton stratigraphy of the Pliocene-Quatemary Sediments of the northern half of the Atlantic Ocean from the equator up to the Rockall Plateau and the Norwegian Sea, is considered. Lowlatitude zonations were used for the subdivision of the Pliocene and Quaternary Sediments of different climatic belts, and certain subglobal zonal units were recognized. Variations in the degree of resolution of the zonation in different latitudes were revealed; the resolution of zonal scales based on calcareous plankton diminishes northwards. Changes of taxonomic composition of the zonal foraminifer and nannoplankton assemblages within various latitudinal belts of the Atlantic were analyzed taking into consideration the influence of climatic factors and of local bionomic conditions. Correlation with the magnetostratigraphic time-scale permitted the establishment of the most reliable appearance and disappearance datums (datum planes) of planktonic foraminifer and nannoplankton species. Paleontologic plates demonstrate some guide forms of two groups of calcareous plankton, and a short description of the taxa is given in the text. Major stratigraphic problems of Pliocene and Quaternary marine deposits are discussed. The monograph can be used in different geological investigations by specialists in geology, paleontology, and oceanology.

本数据集针对大西洋北半部（范围自赤道延伸至罗卡尔海台（Rockall Plateau）与挪威海（Norwegian Sea））的上新世（Pliocene）-第四纪（Quaternary）沉积物中的浮游有孔虫（planktonic foraminifera）与超微浮游生物（nannoplankton）地层学特征展开研究。研究采用低纬度带分带方案，对不同气候带内的上新世与第四纪沉积物进行划分，并识别出若干亚全球级的地层分带单元；研究揭示了不同纬度区间内地层分带分辨率的差异：基于钙质浮游生物构建的地层分带标尺，其分辨率随纬度向北逐渐降低。研究针对大西洋不同纬度带内的分带有孔虫与超微浮游生物组合的分类组成变化，结合气候因素与局域生态环境条件的影响开展了系统分析；通过与磁地层年代标尺（magnetostratigraphic time-scale）的对比，本研究确立了浮游有孔虫与超微浮游生物物种最可靠的首现与末现基准面（datum planes）。古生物图版展示了两类钙质浮游生物的部分指示种，正文同时对各分类单元（taxa）进行了简要描述；本文还探讨了上新世与第四纪海相沉积的核心地层学问题，本专著（monograph）可供地质、古生物学与海洋学领域的专业人员开展各类地质研究时参考使用。