Integrated stratigraphic (litho-, bio-, event, chemo-, gamma ray, and sequence stratigraphy) and sedimentologic analyses of two new core sections greatly improved the understanding of facies development, sea-level changes and correlation of the lower Upper Cretaceous in the south-eastern Münsterland Cretaceous Basin, Germany. A large-scale second-order sea-level cycle is mirrored by the increasing importance of offshore facies and thicknesses of depositional sequences, reflecting the rise of accommodation during the Cenomanian to Early Turonian. In the Middle Turonian, this trend started to become reversed and the cycle ends with a major unconformity at the base of the Soest Grünsand Member in the mid-Upper Turonian. Condensation of the mid- and uppermost Turonian reflects the lack of accommodation during a phase of second-order lowstand, followed by a retrogradational trend during the Early Coniacian that marks the transgressive part of a new second-order cycle. Sedimentary unconformities in the Cenomanian–Turonian successions provide evidence for third-order sea-level changes superimposed onto the first early Late Cretaceous second-order cycle. They correspond to sequence boundaries SB Ce 1–5 and SB Tu 1–4 that have been identified in Central European basins and elsewhere, supporting their eustatic origin. The sea-level fall expressed by Upper Turonian unconformity SB Tu 4 is of major magnitude. The overlying Soest Grünsand Member is the only level of greensands in the Upper Turonian of the south-eastern Münsterland: the Alme Grünsand, introduced for another, allegedly uppermost Turonian greensand level, does not exist. Carbon stable isotopes from the mid-Upper Cenomanian to Lower Coniacian allowed calibrating the successions on intra- and interbasinal scales. A conspicuous mid-Middle Turonian positive isotope event has been newly named, i.e., the Niederntudorf Event. Sequence boundaries, marker beds (marl layers) and bentonites turned out to be isochronous within the chemostratigraphic framework. The identification of Turonian bentonites greatly improved the understanding of the stratigraphic relationships, especially in the Upper Turonian while natural gamma radiation logs turned out as a valuable method for intrabasinal correlation. In conclusion, the new sections provide a high-quality standard succession for the lower Upper Cretaceous in the south-eastern Münsterland Cretaceous Basin.

中文翻译：

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德国明斯特兰白垩纪盆地东南部上白垩统下白垩统：相、综合地层和盆地间对比

两个新岩心剖面的综合地层学（岩石地层学、生物地层学、事件地层学、化学地层学、伽马射线地层学和层序地层学）和沉积学分析大大提高了对上白垩统下白垩统相发育、海平面变化和相关性的认识。德国明斯特兰白垩纪盆地东南部。近海相和沉积层序厚度的重要性日益增加，反映了大规模的二级海平面旋回，反映了森诺曼阶到土伦阶早期的可容纳性上升。在土伦世中期，这一趋势开始逆转，循环以中土伦世中 Soest Grünsand 段底部的重大不整合而告终。土伦阶中上层的凝结反映了在二阶低位阶段缺乏调节，紧随其后的是早康涅茨纪的逆行趋势，标志着新的二阶循环的海侵部分。Cenomanian-Turonian 序列中的沉积不整合为叠加在晚白垩世早期二级旋回上的三级海平面变化提供了证据。它们对应于已在中欧盆地和其他地方确定的层序边界 SB Ce 1-5 和 SB Tu 1-4，支持它们的浮海起源。由上土伦不整合面 SB Tu 4 表示的海平面下降幅度很大。上覆的 Soest Grünsand 段是明斯特兰东南部上土伦阶唯一的绿砂层：Alme Grünsand，为另一个据称是图伦阶最上层的绿砂层引入，但并不存在。从中上森诺曼阶到下科尼亚阶的碳稳定同位素允许校准盆地内和盆地间尺度的序列。一个显着的中土伦时期正同位素事件被新命名，即 Niederntudorf 事件。层序边界、标记层（泥灰岩层）和膨润土在化学地层框架内被证明是等时的。土伦阶膨润土的鉴定极大地提高了对地层关系的理解，尤其是在土伦阶上部，而天然伽马辐射测井被证明是盆地内对比的一种有价值的方法。总之，新剖面为 Münsterland 白垩纪盆地东南部的上白垩统下部提供了高质量的标准层序。