Abstract A high-resolution palynological analysis of the Cenomanian to Lower Campanian in the Trunch borehole, Norfolk (southern North Sea basin) is documented. This constitutes the most detailed continuous record of organic-walled dinoflagellate cysts (dinocysts) from a single Upper Cretaceous section to date. A revised stratigraphic framework for the Trunch succession is presented, integrating regional marker bed lithostratigraphy, macrofossil biostratigraphy and carbon-isotope chemostratigraphy. Palynological events at Trunch are compared to published records with an emphasis on NW Europe, and a new stratigraphy comprising 65 dinocyst events is proposed. A geochronological age model based on radioisotopic and astrochronological ages of macrofossil biostratigraphic datum levels and global carbon-isotope events (CIEs) is used to revise the age calibration of the Upper Cretaceous δ13Ccarb carbonate reference curve for the English Chalk, and to calculate absolute ages for the palynological events with an accuracy judged to be ± 500 kyr. The palaeogeographic distribution of key taxa is presented based on records obtained from the PALYNODATA database and additional records, summarised to 212 sites world-wide. Endemic NW Europe, Northern Hemisphere-wide and global species distributions are demonstrated. A taxonomic and detailed stratigraphic discussion is provided to determine the likelihood that the events may be considered as global first or last appearance datum levels, or are local to regional lowest and highest occurrences. Four global, 21 Northern Hemisphere and 40 NW Europe events are tabulated, including 29 inceptions or extinctions of marker species; an additional 36 events may be of regional significance.

中文翻译：

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从 Cenomanian 到最低的 Campanian（上白垩纪）白垩纪（英国诺福克）和欧洲西北部新的甲藻囊肿生物事件地层学的孢粉学

摘要 记录了诺福克（北海南部盆地）Trunch 钻孔中森诺曼阶到下坎帕阶的高分辨率孢粉学分析。这构成了迄今为止来自单个上白垩统剖面的有机壁甲藻囊肿（双囊）的最详细的连续记录。提出了特鲁奇层序的修订地层框架，整合了区域标记床岩石地层学、大型化石生物地层学和碳同位素化学地层学。将特鲁奇的孢粉事件与已发表的记录进行比较，重点是欧洲西北部，并提出了包含 65 个双囊壳事件的新地层学。使用基于大型化石生物地层基准水平和全球碳同位素事件 (CIE) 的放射性同位素和天体年代学年龄的地质年代学年龄模型来修正英国白垩纪上白垩统 δ13Ccarb 碳酸盐参考曲线的年龄校准，并计算绝对年龄孢粉事件的准确度被判断为 ± 500 kyr。关键分类群的古地理分布基于从 PALYNODATA 数据库获得的记录和其他记录，汇总到全球 212 个站点。展示了欧洲西北部、北半球和全球物种分布。提供了分类学和详细的地层讨论，以确定事件被视为全球首次或最后出现的基准水平的可能性，或者是局部到区域最低和最高出现。四个全球事件、21 个北半球事件和 40 个西北欧事件被列出，包括 29 个标记物种的开始或灭绝；另有 36 项活动可能具有区域意义。