Cretaceous Nannoplankton Biostratigraphy and Oceanography of the Northwestern Atlantic Ocean
Cretaceous Nannoplankton Biostratigraphy and Oceanography of the Northwestern Atlantic Ocean
复制标题
西北大西洋白垩纪微浮游生物生物地层学和海洋学
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
P. Roth
中科院分区：
文献类型：
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作者：
P. Roth
一个尝试性的白垩纪nannoplankton分带和生物地层的古典欧洲和新提出的海洋阶段，以及重要的古生物事件和地质年代边界的放射性年龄。本文讨论了390和391站钙质微型浮游生物的分布。研究了石缝虫Lithraphidites carniolensis-L.前赤道湖quadratus用于最上一个达吉丹阶的生物地层细分。讨论了白垩纪微型浮游生物演化和白垩纪海洋学的一个工作假说。提出了一个新属（Haqius）和两个新种（Lithraphidites praequadratus和Cyclagelosphaera bergeri）。本文讨论了早白垩世Retecapsa的演化，并提供了它们的光学显微照片。neocomiana，河angustiforata，和/？，布赖顿ii。
A tentative Cretaceous nannoplankton zonation is given and the biostratigraphic extent of classical European and newly proposed oceanic stages as well as radiometric ages for important paleontological events and geochronologic boundaries are presented. Calcareous nannoplankton distribution at Sites 390 and 391 is discussed. The evolutionary lineage of Lithraphidites carniolensis-L. praequadratus-L. quadratus is used for the biostratigraphic subdivision of the uppermost Bermudan Stage. A working hypothesis of Cretaceous nannoplankton evolution and oceanography of the Cretaceous oceans is discussed. One new genus (Haqius) and two new species (Lithraphidites praequadratus and Cyclagelosphaera bergeri) are proposed. The evolution of Retecapsa during the Early Cretaceous is discussed and light micrographs are provided for/?, neocomiana, R. angustiforata, and/?, brightonii.