Towards a global stratigraphic scheme for the Campanian - Maastrichtian (Late Cretaceous): Calibration of carbon isotope stratigraphy with paleomagnetic chrons and biostratigraphy

最新的白垩纪的特点是全球碳循环的扰动，这被认为与短暂的冰川作用有关。为了了解强迫机制、它们的全球意义以及对这些事件的区域反应，有必要改进我们目前可用的地层框架。意大利Umbria Marche盆地古比奥（Gubbio）的远洋灰岩序列具有详细的磁地层学特征，可作为钙质纳米化石和浮游有孔虫生物分带的热带参考资料。我们建议在Contessa Highway和Bottaccione路段建立一个高分辨率的碳同位素地层，利用大块碳酸盐来解决80-65 Ma之间的短寿命同位素事件，校准古地磁反转和生物事件。这种综合地层格架的发展对全球低纬度和高纬度以及陆架和深海剖面的对比具有重要意义。它提供了一个独特的机会，可以识别不同海洋生态系统的碳循环、海平面变化和海洋环流之间的领先和滞后。

The latest Cretaceous was characterised by perturbations in the global carbon cycle which are assumed to have been associated with ephemeral glaciations. In order to understand the forcing mechanisms, their global significance, and the regional response to these events it is necessary to improve our presently available stratigraphic framework. The pelagic limestone successions at Gubbio, Umbria Marche Basin, Italy have a detailed magnetostratigraphy and serve as tropical reference for the biozonation with calcareous nannofossils and planktonic foraminifera. We propose to develop a high-resolution carbon isotope stratigraphy at the sections Contessa Highway and Bottaccione using bulk-carbonates to resolve short-lived isotopic events between 80-65 Ma calibrated to paleomagnetic reversals and bioevents. The development of such an integrated stratigraphic framework is important for the global correlation between low and high latitudes and shelf and deep-sea sections. It provides the unique opportunity to recognize leads and lags between the carbon cycle, sea-level changes and ocean circulation of the different oceanic ecosystems.