Der Keuper in der Stratigraphischen Tabelle von Deutschland 2016 – kontinuierliche Sedimentation in der norddeutschen Beckenfazies (Variante B)
The Keuper Group in the Stratigraphic Table of Germany 2016 – continuous sedimentation in the North German Basin (variant
Abstract: As a result of recent extensive palaeontological investigations large parts of the Keuper in the North German Basin are now dated by means of palynomorph and conchostracan biostratigraphy. The progress in biostratigraphic dating has contributed to an improved correlation of the Keuper with the chronostratigraphic standard of the Upper Triassic. Evidence for the presence of all Upper Triassic stages and substages points to largely continuous deposition of the Keuper in the North German Basin. Significant stratigraphic gaps are associated with the Schilfsandstein Unconformity (base Stuttgart Formation), Early Cimmerian Unconformity (base Arnstadt Formation) and Rhaetian Unconformity (intra-Exter Formation) but are restricted to intra-basinal swells and basin margin areas. Local stratigraphic gaps resulting, for example, from fluvial incision are also present. In future, a clear distinction should be made between significant unconformities and local stratigraphic gaps in Keuper successions. The improved biostratigraphy also enables precise dating of major facies changes. The Muschelkalk/Keuper and Steinmergelkeuper/Rhaetian facies changes are strongly diachronous from north to south and west to east respectively. Other facies changes, such as that at the base of the Stuttgart Formation, are only slightly diachronous in some parts of the basin. As a consequence, diachronous lithostratigraphic boundaries resulting from such facies changes should be taken into consideration in stratigraphic schemes.
Keywords: BECKEN; CARNIAN; CENTRAL EUROPEAN BASIN; CONTINUOUS SEDIMENTATION; DISKORDANZEN; GERMAN BASIN; KARNIUM; KONTINUIERLICHE SEDIMENTATION; LACIAN; LACIUM; MITTELEUROPÄISCHES; NORDDEUTSCHES BECKEN; NORIAN; NORIUM; NORTH; RHAETIAN; RHAETIUM; UNCONFORMITIES
Document Type: Research Article
Publication date: 01 June 2018
- Zeitschrift der Deutschen Gesellschaft für Geowissenschaften (ZDGG) is an international peer reviewed journal that accepts papers on research and applied topics in the Earth Sciences. It is published online and in print. One volume, consisting of four issues is published annually. The journal is continously published by the German Geological Society since its foundation in 1848. It was relaunched in 2005.
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