Transatlantic d13C correlation and establishment of New-World reference curves for the potential d13C definition of stage/substage boundaries in the Turonian and Coniacian (Upper Cretaceous).

D13C块体岩石曲线用于洲际对比的高分辨率对比潜力尚未被用于都罗系至哥尼亚统(上白垩统)岩石。尽管欧洲成熟的d13C对比格架显示出曲线，具有生动的过程，具有显著的峰值、尖峰或高原，具有极好的地层学价值，但大多数高分辨率对比仅限于所考虑的区间内的欧洲盆地。因此，该项目首次旨在建立巴西、墨西哥和欧洲之间的d13C关联网络。通过这种方法，可以很容易地克服由于选择性采样、生物地理或索引类群的相依赖而导致的生物地层对比的不准确性，这有助于对任何生物分区进行校准。预计将在图罗尼亚中部/上图罗尼亚界线区间和图罗尼亚/科尼亚克斯界线上核查两个重要的d13C标记物。这一证据将通过广泛的正尖峰(佩西事件)来证明中/上图罗尼亚边界的定义是正确的。Lengerich段(德国)被认为是潜在的GSSP。在图罗尼亚/科尼亚克界线正规化的背景下(拟议的GSSP Salzgitter-Salder，德国)，迫切需要考虑将边界上的负峰作为额外的/替代的年代地层界线标志。

The high-resolution correlation potential of d13C bulk-rock curves for intercontinental correlation is not yet exploited for Turonian to Coniacian (Upper Cretaceous) rocks. Although the well established d13C correlation framework of Europe exhibit curves with a vivid course with significant peaks, spikes or plateaus with an excellent value for stratigraphy, most high resolution correlations are restricted to basins within Europe in the interval considered. Therefore, this project ¿ for the first time ¿ aims at the establishment of a d13C correlation network between Brazil, Mexico and Europe. By this, biostratigraphic correlation inaccuracies caused by selective sampling, biogeography or facies dependency of index-taxa can easily be overcome, which aids calibration of any biozonations. The verification of two significant d13C marker in the Middle/Upper Turonian boundary interval and at the Turonian/Coniacian boundary is expected. This proof will justify the definition of the Middle/Upper-Turonian boundary by a wide-spread positive spike (Pewsey Event). The Lengerich section (Germany) is considered as a potential GSSP. In context with the Turonian/Coniacian boundary formalization (proposed GSSP Salzgitter-Salder, Germany), a negative peak at the boundary needs urgently to be considered as an additional/alternative chronostratigraphic boundary marker.