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首页> 外文期刊>Facies >The lower Upper Cretaceous of the south-eastern Munsterland Cretaceous Basin, Germany: facies, integrated stratigraphy and inter-basinal correlation
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The lower Upper Cretaceous of the south-eastern Munsterland Cretaceous Basin, Germany: facies, integrated stratigraphy and inter-basinal correlation

机译：德国东南部的下白垩纪下白垩纪下白垩纪：面部，集成地层和间隔互相相关

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摘要

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 Munsterland 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 Grunsand 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 Grunsand Member is the only level of greensands in the Upper Turonian of the south-eastern Munsterland: the Alme Grunsand, 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
机译：综合地层（Litho，Bio，事件，化学，伽马射线和序列地层）和两个新核心部分的沉积学分析大大提高了对面部发展的理解，海平面变化和下层白垩纪的相关性德国南部的Munsterland Cretaceous盆地。大规模的二阶海平周期循环受到海上面部和沉积序列的厚度的重要性，反映了临曼尼亚人到早期的涡轮增长期间的住宿的兴起。在中间涡轮上，这种趋势开始变为逆转，周期以上上部涡轮师中高原成员的底座以主要的不整合。最高的涡轮上的凝结反映了在二阶低位期间缺乏住宿，其次是在早期的Coniacian期间的逆行趋势，标志着新的二阶周期的违规部分。 Cenomanian-Turonian继任中的沉积不一致提供了叠加在第一个早期白垩纪二阶周期的三阶海平面变化的证据。它们对应于在中欧盆地和其他地方识别的序列边界SB CE 1-5和SB TU 1-4，支持它们的突然来源。由上部涡轮增多无关SB TU 4表示的海平面秋季是主要的数量。覆盖的SOEST Grunsand成员是Munsterland的山地楼上唯一的绿洲的唯一水平：据称介绍了另一个据称的涡卷般的绿洲和林兰和级别的Alme Grunsand。碳稳定同位素来自中上部雪马尼亚，以降低Coniacian，允许校准内间尺度和间间鳞片的次数。一个显着的中间中间涡轮县积极同位素事件已经新命名，即niederntudorf事件。序列边界，标记床（MARL层）和膨润物原来在内

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